Technologies
Start Your Project Off Right With the Best 3D Printing Filament in 2022
There are a lot of different 3D-printing materials out there. Here’s how to pick the right one for your project.
You’ve got the best 3D printer you can buy, but without materials, you can’t get printing. If you chose a fused deposition modeling, or FDM, printer — the most common type of 3D printer for hobbyists — you’ll need a few rolls of special plastic. The material we use for FDM 3D printing is called filament and it’s an easy material to pick up. There are, however, different types of filament, each good for certain projects and terrible for others. You’ll want to make sure you’re using the best filament for the job at hand, or it may fail.
I’ve put together this primer of the different types of filament as well as choices of the best filaments from my favorite brands. This will be updated regularly and contains some great choices for you to start.


It’s important to choose both the right type of material and the right brand of that type, be it PLA, ABS or something more exotic. Here are the best of each of the five main filament types.Â
Read more: Best 3D Printers
Those categories are:


PLA is the easiest material to use to make awesome things.
James Bricknell/CNETPolylactic acid
Polylactic acid, or PLA, is the most common 3D printing filament and the easiest to use. Unlike most plastics, it’s made from corn starches so it is non-toxic and, in theory, compostable, though it takes an industrial composter to do it. PLA uses a fairly low heat — between 190 and 215 degrees Celsius (or between 374 and 419 degrees Fahrenheit) — to melt the plastic for extrusion so it is the safest of the filaments. Almost every FDM 3D printer in the world can print PLA.Â
PLA pros
- Nontoxic
- No awful smell
- Easy to use for a beginner
- Almost universally usable on any FDM printer
- Very cheap
PLA cons
- Can require a lot of sanding
- Can easily warp in the sun or high-temp environments
- Can be brittle
MatterHackers
Build PLA from MatterHackers is great for projects that require finishing (sanding, painting and so on). I have about 12 rolls of it in my workshop, and use it for large projects, including my Mandalorian armor or cosplay swords. The dimensional accuracy — how consistent the diameter is along the length of the roll — is good, though nothing mind-blowing. It’s well within the sweet zone.
Post-processing is where Build Series PLA shines. It is simple to sand and holds paint well, as long as you use a good primer and filler first. Like all PLA, it holds together well using superglue and even takes putty and Bondo without complaint.Â
Flashforge
The color of this PLA is hard to describe, but it is beautiful. It has a purple-blue-green hue to it and looks like metal that’s been heated up a lot. Right now it’s probably my favorite-looking filament on my shelf.
It’s also easy to print with, and because of the shifting colors it hides layer lines well. If you’re looking for a dark filament that you aren’t painting over, I’d pick up a few rolls of this today.
MatterHackers
For something completely different in the PLA world, check out Quantum by MatterHackers. Transitional filament, mixing multiple colors, has been around for a while, but it normally changes color across the length of the material. This causes it to change color as it goes further up the model.
Quantum is actually two colors fused across the entire width, so you get an amazing transition from left to right. It’s absolutely mesmerizing, and I love using it for all sorts of different projects. From vases to giant articulated octopuses, it makes any model look breathtaking.Â
Cookiecad
I have been meaning to buy some of this beautiful filament for some time now, and I’m really happy I did. The color is almost exactly the same as Mint choc chip ice cream and the tiny flecks of marble color enhance the look even more. It prints great, with a nice glossy finish, and I found printing it at a higher temperature brings out that gloss really well.Â
More importantly than the print quality though, I love it for the way it makes me feel. The color just makes me happy and reminds me of days at the beach with my kids. It’s gorgeous.
Sunlu
Sunlu is one of those filaments that is really easy to get hold of and prints well every time you use it. It says its dimensional accuracy is +/- 0.02mm, but I’ve been lucky to never have the variance above 0.01mm in hands-on use.Â
Sunlu also comes in some beautiful matte colors, which is a welcome break from more common shiny filaments. Sanding and printing with it is easy. If you’re new to 3D printing and need to increase your collection of PLA, this is a cheap way to do it.
James Bricknell/CNET
Rainbow filament tends to transition between colors very slowly. This means you often get only one or two colors per model. Creality’s latest rainbow filament has a much shorter transition, so you get a much nicer rainbow effect across your models. It looks great on this amazing dragon from Fotis Mint.
Polymaker
For projects you can show off without having to paint them first, PolyTerra might be for you. The colors are vivid, and because they are matte, you don’t lose details in the reflections like with shiny filament.
PolyTerra also comes in recycled cardboard reels, and the creator, Polymaker, will plant a tree in the area where the roll was bought to help offset the cardboard used. This filament is still plastic of course, but it helps my conscience to use it.
Ataraxia Art
In this article about this flexible PLAÂ I explained how, although this isn’t technically PLA, it does print much easier than TPU, a more common flexible filament. I used it to print an amazing Mandalorian Blacksmith helmet for my 4-year-old. She can’t break it because it’s so bouncy.
This isn’t for newbies, though. It took a lot of trial and error to get the setting for my 3D printer right, and because it is so soft the accuracy can be pretty wonky. But for something that’s different from normal PLA, it is worth checking out.Â
Acrylonitrile butadiene styrene
ABS was one of the more 3D printing filaments a few years back, and it still has some excellent uses. The biggest downside is the toxicity. You don’t want to breathe in ABS as it melts, so you’ll need a well-ventilated area. That aside, it’s sturdier and more heat-resistant than PLA. Most printers can print ABS, but you’ll need a heated bed that can reach 100 degrees Celsius for best results and protecting your printing job in an enclosed printer is a good idea.Â
ABS pros
- Can withstand a lot of heat
- Easy to sand
- Can be smoothed with acetone for a perfect shine
ABS cons
- Its fumes are toxic so it requires ventilationÂ
- It needs far more heat to print than PLA
- You will need an enclosure to get good results
Inland
Inland makes good filament across the board and its ABS is no different. I’ve never had issues with the dimensions, and the final product has consistent layer lines. Sanding Inland ABS is a joy as the material can be wet-sanded to a smooth finish.
MatterHackers
Fillamentum is one of my favorite ABS makers. The colors are always so vibrant, and while it costs a little more than the competition, it keeps that vibrancy even after the model is finished printing. If you’re looking for ABS that you don’t need to paint, Fillamentum is a great place to start.
Polyethylene terephthalate glycol
PETG is chemically similar to the plastic that water and soft drink bottles are made of, and is a great alternative to ABS. It has the heat-resistant properties of ABS without the toxic fumes and can be sanded much like PLA. Most FDM printers that can print PLA can print PETG, though it takes a little more effort to get right.
PETG pros
- Easier to print than ABS
- Holds a finish well
- Easier to store than other filaments
PETG cons
- Requires high temps, which can damage printer parts over time.Â
Protomaker
This USA-made PETG has an excellent glassy look that is hard to achieve in melted plastic. The aqua color is subtle and gives the appearance of a stained glass window when printed at the high end of its temperature scale.
Printing with it was easy, though the roll is a little big for printers like the Bambu Lab X1, that has enclosed filament system.
Matterhackers
The Pro series filament from MatterHackers is a much nicer product than a lot of standard PETG. Yes, it costs a little more, but it’s designed to help reduce some of the issues that filament suffers from. It reduces shrinkage, so the part you make is as close to the part you designed as possible. This is a great material for those who make 3D printed models for a living, rather than a hobby.
Overture
Overture PETG is a favorite because it comes in an economical two-pack, making it ideal for multiple or larger jobs. I’ve used a lot of Overture products, including PETG and PLA, and they always print well. I once printed an 11-foot-long Masamune sword using Overture and it came out looking awesome.
Thermoplastic polyurethane
TPU is a flexible material that can make cool rubbery models. Most people use it to 3D print phone cases, but more serious modelers often use it to create connectors or flexible hinges to other materials. It can be a difficult material to work with and is best used on a direct-drive 3D printer such as the Prusa Mk3s, rather than a Bowden printer like the Anycubic Vyper. A direct drive printer places the gears to move the filament directly on the print head, while a Bowden setup has them on the frame of the printer.Â
TPU pros
- Flexible
- Won’t warp in the heat
- Available in fun colors
TPU cons
- Terrible for making solid prints
- Hard to work with on budget printers
MatterHackers
MatterHackers Build Series Materials sit in the perfect balance between usability and cost. Yes, I’ve had failures with the Build Series, but once you get it dialed into your printer, you can make dozens of fun, springy models.Â
I like to use it to make fun toys for my kid’s preschool as they can be thrown around with no fear of breaking into small, sharp pieces.
Exotic filaments
Exotic filaments are ones that are outside the normal five choices, or interesting variations on those choices. They’re often PLA mixed with carbon fiber or glow-in-the-dark chemicals and something that prints outside the normal parameters of a 3D printer. You’ll often need to upgrade your printer nozzle to use these. It’s advanced stuff, but I wanted to show you my favorite glow-in-the-dark filament, which is fun to print with.
Amolen PLA
Glow-in-the-dark filament normally comes in a standard “radioactive” green, but this beautiful roll transitions through multiple colors. It’s simply gorgeous.Â
It’s also worthwhile to buy some replacement brass nozzles for your printer as glow-in-the-dark filament can chew them up pretty quickly because the glowing material is more abrasive than standard colors.Â
Filament FAQ
What filament should I start with?
If you’re buying a printer for the first time, the best choice of filament is PLA. It is the easiest to print with, the safest in terms of fumes and the most readily available. Think about laying in a store of PLA when you first start. A 1-kilogram roll feels like a lot, but once you get the itch, materials get eaten up quickly.
Are there different sizes of filament?
Yes. There are two main thicknesses of filament and if you get them mixed up, your machine won’t print.Â
1.75mm filament is the most common. It’s been adopted by most of the 3D manufacturers in the world and if you have an entry-level printer, it’s likely to run on 1.75mm filament.
Some 3D printers still use the thicker 3mm style, though, so make sure you know which one yours uses before you spend a lot of money on the wrong material.
Are all filaments toxic?
When 3D printing with any filament, it is important to remember that you are essentially burning plastic. Inhaling that kind of thing is never going to be good, but not all filaments are equally bad.
Of the four main filament types, ABS is easily the most toxic. You shouldn’t think about printing it unless you have a well-ventilated space away from your day-to-day living spaces. I have a workshop with a full ventilation system and the fumes can still be pretty bad.
Both PLA and PETG are considered nontoxic, though you still want to keep your area ventilated as you use them. Both filaments are safe to print inside your home and while the fumes can smell pretty bad, they’re not classed as carcinogenic. While other forms of TPU can be toxic, the filament you use for 3D printing is considered nontoxic and nonreactive so you should be fine printing that as well.
Does the filament keep the same color after printing?
Normally yes. If your printer isn’t calibrated well, it could burn the filament, which would discolor it. But normally the color accuracy is pretty close.Â
A special note on clear plastics: You will not be able to get a completely translucent print with filament. The nature of the printing process makes any clear plastic misty and infill makes it blurry as well. If you are looking to print glass-like models, you will need a resin printer.


Having the right diameter makes for a better print.
Dan Ackerman/CNETHow we test filament
The testing of filament is mainly focused on a few details: Dimensional accuracy, winding precision, and printing quality. Winding precision is a visual test where I check to make sure the filament works well on the spool, without any crossovers that can cause snags while printing.
Print quality is done using a CNET calibration test that I use to test all of the 3D printers I review. When checking for filament quality, I’m looking for noticeable roughness and missing filament where moisture or other contaminants have interrupted the process of melting and cooling.


Dimensional accuracy is perhaps the most important test as it measures the consistency of filament. As you move along, the filament changes in diameter will cause the 3D printer to over- or under-extrude filament. This creates noticeable scarring in your model, or worse, complete failure. You want the material to have the same diameter the whole way through.Â
To measure the accuracy, I take a 5-meter piece of filament from the beginning, middle and end of the roll and measure the diameter at four equally spaced points. I then add all of those measurements up and divide the total by 12 — the total number of measurements taken — to give me an average across the roll. Most modern printers use 1.75mm filament so you want the filament to be as close to that as possible.Â
Great filament has a variance of +/- 0.02mm, good filament is +/- 0.03mm and rough filament is anything +/- 0.05mm. All of the filaments we have recommended here are at least 0.03mm on average.
More on 3D printing
Technologies
NBA commissioner Adam Silver says league could introduce âsmart ballâ technology as soon as next year
Commissioner Adam Silver says the NBA could begin using a new “smart ball” in games as soon as next year, potentially transforming how officials make calls.
NBA Commissioner Adam Silver says the league could begin using a new âsmart ballâ in games as soon as 2027, potentially transforming how officials make calls on the basketball court.
In an interview with CNBCâs Contessa Brewer, Silver revealed that the NBA is working with official basketball manufacturer Wilson to develop a ball embedded with a tiny microchip Bluetooth sensor that can track movement, spin and changes in trajectory.
âWeâre experimenting with putting a small chip in the ball that weighs roughly a gram,â Silver said.
The technology has already been tested in the NBAâs G League, Summer League, and some preseason games, where players used basketballs both with and without the chip. Silver said players have been pleased with the results.
âNobody could tell the difference. So thatâs a good sign,â he said.
The chip weighs just one gram, compared with the roughly 620-gram or 1.4 pound basketball. Silver said the league wanted to ensure that even the most experienced players wouldnât notice a change in how the ball feels or bounces.
One of the most immediate applications could be officiating.
Silver said the technology could help referees determine whether a player touched the ball before it went out of bounds by detecting subtle changes in its spin. It could also help identify whether a shotâs trajectory was altered.
âI think you could see as soon as next year us using it for officiating in our games,â Silver said.
Beyond officiating, Silver sees a significant opportunity to bring the technology to consumers, allowing basketball players of all ages to analyze and evaluate their shooting mechanics.
For example, a player taking hundreds of shots could use data collected by the chip to understand which shooting angles and ball rotations are most likely to result in a basket.
âYouâll then see the graph, and youâll see for which the angle of the shots that went in, theyâre more likely to go in,â Silver said.
While the officiating application could arrive as soon as next year, Silver said a consumer version may take longer.
âI think the consumers version [of the smart ball] is a few years away, but itâs a really exciting opportunity.â
NBA playersâ union raises concerns over wearables
The league is also exploring the use of wearable technology during games, but negotiations with the National Basketball Players Association have yet to produce an agreement.
The NBA says officials experimented with wrist wearables in select preseason and summer league games this year in a âsuccessful pilot program,â but it will not extend into the season. The technology allowed the referees to communicate with the replay center about reviews, scoring changes and clock malfunctions.
Silver said players routinely use wearable devices off the court to monitor everything from sleep to physical performance, but concerns remain over how data collected during games could be used by teams.
âI think we have to come to some agreement on exactly how the information is used. But it seems everybody wants that information,â Silver said.
The biggest sticking point is whether that information could affect contract negotiations, Silver said.
âIf you could see a player was slowing down or something like that, theyâre worried that that could get used in bargaining, and I get that,â he said.
Silver acknowledged those concerns and said the league needs to reach an agreement with the playersâ union on how the information would be used.
Still, he suggested that allowing wearables during games is a logical next step as athletes increasingly rely on technology to monitor their performance.
âI think the players are in a position right now where theyâre essentially wearing wearables 22 hours a day, and the only time theyâre not wearing them is when theyâre playing in the game,â Silver said. âSo that canât make sense.â
âWeâll work something out with them,â he added.
Technologies
AIâs quiet safety gatekeepers are stepping into the spotlight
The intensifying AI safety debate is bringing a small group of third-party evaluators into the center of a multitrillion-dollar industry.
Two months ago, independent evaluators occupied a relatively sleepy corner of the multitrillion-dollar artificial intelligence industry. Now theyâre being asked to come to its rescue.
While Anthropic and OpenAI are the heart of a fierce debate over whether they can safeguard their advanced models and grow their businesses simultaneously, the companies are seeking support from a handful of small third-party groups like Model Evaluation and Threat Research (METR), Apollo Research and Transluce.
The evaluators, which mostly operate as nonprofits, are still finding their footing in an industry where capital is flowing at historic levels and new models are rolling out faster than ever. Their primary role has been to assess AI model capabilities and risks, and to call attention to instances where the technology behaves badly.
In the absence of a federal push for regulations, evaluators have taken on outsized importance. Anthropic CEO Dario Amodei pledged to embed independent evaluators in his company last month â a move that OpenAI CEO Sam Altman quickly endorsed.
President Donald Trump supported the idea, as did most of the largest U.S. tech companies. But left unanswered are questions about how those third parties should be funded, what level of access they will have and what the reporting structure will ultimately look like.
âTo a degree, the problem, as always, is money,â Suresh Venkatasubramanian, a computer science professor at Brown University, told CNBC in an interview. âWho is paying for these companies to do their work? How are they going to support them? You need an ecosystem, you need a viable business model for this.â
Right now, Anthropic, OpenAI and the infrastructure partners that are profiting from the AI boom are writing the rules. Critics say thatâs like asking the biggest banks to protect us from a financial crisis or allowing pharmaceutical companies to put drugs on the market without regulatory clearance.
President Trump recently lauded AI executives for their âtremendous self-policing,â and signaled that he intends to leave companies to their own devices, unwilling to impede the growth of the industry thatâs driving the economy and stock market. Trump encouraged AI companies to âpartner with an independent external auditor or evaluatorâ as part of a voluntary accord he presented in late September.
Itâs a conversation that Amodei kicked off In his viral essay last month, when he called for a âslower paceâ in advanced model development after researchers left his company and voiced their concerns about the existential threats the technology poses.
As the AI labs move to put evaluators in place, friction is already starting to emerge.
OpenAI fired three employees last week for âviolating our policies on accessing and handling sensitive company information,â according to a spokesperson. Two of those employees, Mikita Balesni and Tomek Korbak, said they believe they were dismissed because of how they communicated with third-party evaluators.
âMy former colleagues are telling me they are confused about what to believe,â Balesni wrote in a post on X on Thursday. âThey also are afraid to speak, and worry their personal phones will be searched for messages to us and third parties. I worry the pervading fear to speak up and engage with third parties will mean OpenAI will cut corners on safety behind closed doors.â
OpenAI disputed that characterization and said in a post on Friday that itâs âactively finalizing contracts with third-party safety assessors and will announce details in the coming weeks.â
âWe are committed to embedding external assessors and continue to make close collaboration with independent safety organizations a core part of our safety work,â OpenAI wrote.
An OpenAI spokesperson said in an emailed statement that its upcoming work with evaluators âbuilds on existing collaboration with independent safety organizations,â including METR and Redwood Research.
Anthropic didnât respond to CNBCâs request for comment.
âIâve never seen an issue move so fastâ
The AI evaluator ecosystem consists mostly of small organizations, including METR and Apollo Research, and larger accounting and auditing firms like Accenture.
AI labs have been working with evaluators in limited capacities, but Andrew Freedman, CEO of policy nonprofit Fathom, said the field is quickly maturing.
âIâve worked in politics and policy for the last 20 years of my life, and Iâve never seen an issue move so fast on so many different political spectrums,â Freedman told CNBC in an interview. He said he expects an âinflux of capitalâ to flow into the ecosystem.
Rayan Krishnan, CEO of independent evaluator Vals AI, said his for-profit startup, which builds benchmarks to measure how AI models perform on industry-specific tasks, has grown from eight employees to roughly 30 this year, and in August announced a $40 million funding round.
METR, a nonprofit, announced in August that it had raised commitments of around $71 million over the last six months. Thatâs up from total 2024 contributions of $13.6 million, according to the groupâs most recent filing with the Internal Revenue Service.
By late that month, METRâs profile had risen further. OpenAI enlisted two of its employees and a contractor to put together a postmortem report detailing how the companyâs models escaped containment, accessed the open internet and breached open-source developer platform Hugging Face. METR said it did not accept payment from OpenAI for the assessment.
Kevin Werbach, faculty director of the Wharton Accountable AI Lab at the University of Pennsylvania, said the ecosystem is ânot robust enough right now.â METR, for example, employs fewer than 50 full-time staffers, according to its website.
The power imbalance between the small evaluators and the leading labs that have raised tens of billions of dollars and employ thousands of people raises questions surrounding potential conflicts.
âIf you want true third-party evaluation, you need true independence financially and otherwise,â said Venkatasubramanian. âItâs not just a matter of not getting paid, itâs a matter of, will there be consequences if I am an auditor and I put out a report that looks unfavorable to this company? Is my business going to dry up?â
Anthropic acknowledged the complexity in a blog post last month, as it announced it will embed employees from Faculty, Accentureâs specialist AI business, to test safeguards and assess whether models will behave in line with human values. Anthropic said that âgiven the importance and urgency of this work,â it will fund Accentureâs contributions directly.
âThere are, as yet, no standards for what information embedded evaluators should have access to, or how they should report what they find. There is also no settled system for funding independent evaluation,â Anthropic said. âLong-term, we think funding should come from pooled or government sources.â
Anthropic said itâs in discussions with METR and other nonprofit evaluators that are planning to use their own funding to pilot âelementsâ of embedded evaluation.
Will the government step in?
In June of last year, Fathom introduced a marketplace framework for Independent Verification Organizations, or IVOs. These groups would be licensed by the government and authorized to test whether AI companies are meeting various safety criteria.
Freedman, the groupâs CEO, said government oversight is key because otherwise third-party evaluators can become beholden to the large AI labs for revenue, incentivizing them to âstart rubber stamping stuffâ to maintain favor.
Some lawmakers are on board.
IVOs are a key provision of the âłFrontier Risk Oversight, National Transparency, Independent Evaluation, and Reportingâ (FRONTIER) Act, which Reps. Lori Trahan, D-Mass., and Jay Obernolte, R-Calif., introduced in July. Fathom helped draft language and provided technical expertise for the bill, Freedman said.
OpenAI global affairs chief Chris Lehane told reporters in September that he sat down with one of the billâs sponsors on Capitol Hill to express support for the IVO provision.
âIt was important for them to hear that and hear it from us, and we wanted to be really clear about that,â Lehane said, according to reports.
Meanwhile, lawmakers in California, Connecticut and Virginia have taken steps to implement IVOs, and states like Massachusetts are weighing independent safety evaluations more broadly.
California Governor Gavin Newsom recently signed two bills involving IVOs, one establishing a âfirst-in-the-nation framework,â and the other creating a state registry for AI auditors. Anthropic threw its support behind both bills in August, and OpenAI formally endorsed them last month, the same day Newsom signed them into law.
Lehane wrote in a blog post at the time that âwe prefer independent technical assessments to be required at the federal level,â but in the absence of federal action, âCalifornia can help establish the rules of the road.â
Freedman said he thinks it will be âreally difficultâ for companies like OpenAI and Anthropic to work out how to engage with independent evaluators on their own. However, with the governmentâs role unclear, âitâs a muscle worth developing in the interim,â he said.
For now, the closest thing the industry has to a set of standards is what Trump called a âmorally bindingâ agreement at a luncheon he hosted for tech leaders at the White House late last month.
The one-page accord says that âevery company is responsible for developing its own technology safely and in a way that builds trust with customers and the public.â It also encourages signees to work with an âindependent external auditor or evaluator to carry out independent assessments.â
The document was signed by top execs at Anthropic, Google, Meta, OpenAI, SpaceX and Nvidia, a rare show of solidarity between leaders who have shared conflicting views on addressing AIâs risks. The executives still have to chart their own paths forward.
âIt was a performance of an attempt to show action when in fact no action actually happened,â Venkatasubramanian said. âThe things that they promise to do are things they should have been doing already, and, in fact, have claimed that they were doing in the past.â
Amodei, in his September essay, said Anthropic will equip evaluators with desks, access badges, company laptops, and permissions that are âmostly comparableâ with internal risk assessment teams. Additionally, evaluators will be supported with contracts that give them âthe right to publish key findings,â with Anthropic reserving âthe narrow abilityâ to redact certain security-sensitive or confidential information.
âThis is an unusual step for a company, but we think it is important to prove out the concept of embedded external reviewers,â Amodei wrote.
OpenAI published its own proposal days later, and said evaluators should work on âscoped and mutually agreed upon claims for assessment,â clearly explain their methodology and standards, demonstrate relevant technical expertise and disclose conflicts of interest.
The AI Evaluator Forum, which includes METR, the AI Verification and Evaluation Research Institute (AVERI), and other groups, published a public letter last month titled, âMinimum Conditions for Embedding Evaluators.â
The letter said evaluators should be transparent, shielded from retaliation and granted access equivalent to AI companiesâ âown highly privileged employees.â
âEmbedded evaluations cannot address all oversight needs and should be treated as a complement to, rather than a replacement for, broader efforts by frontier AI companies to expand external oversight,â the letter said.
Freedman said heâs seen a shift in posturing out of OpenAI and Anthropic in recent months, largely because theyâve realized they wonât be able to roll out their advanced systems without the publicâs trust.
âI donât think you need to trust that theyâve suddenly turned altruistic or that thereâs anything but corporations acting like corporations,â Freedman said.
That underscores perhaps the central problem, Werbach said. OpenAI and Anthropic are, first and foremost, competing with each other as they march toward the public markets and seek trillion-dollar-plus valuations.
âThere is a tremendous amount of personal distrust between those two companies,â Werbach said. âEven though thereâs also tremendous agreement about the need for this kind of evaluation to happen.â
WATCH: Bradley Tusk on Anthropic IPO: Why add public market pressure if safety is your top priority?
Technologies
Trump says he is ‘going to look at’ joining Saudi Arabia in the fight against Iran-backed Houthis after deadly airport strike
U.S. military involvement in the fight against the Houthis would stretch resources in the Middle East already committed to fighting Iran, analysts said.
President Donald Trump said he is considering joining Saudi Arabia in its retaliation against Tehran-backed Houthis in Yemen after a deadly attack on Riyadhâs main airport, a move that could draw the U.S. further into a second front in the Iran war.
âWe may. Weâre going to look at it,â Trump told reporters outside the White House on Saturday when asked if the U.S. would back Saudi Arabian strikes. âWe just found out about the recent attack. So, weâll make a decision. We move very quickly.â
Two Saudi Arabian government officials told MS NOW that the kingdom is requesting âurgent defense supportâ from the U.S. following the attacks.
The officials, including a senior member of the Ministry of Foreign Affairs, did not want to be identified because of the matterâs sensitivity. They added that the U.S. needs to intervene âas soon as possibleâ to help the Saudi-led coalition in Yemen fight the Houthis.
The White House did not immediately respond to a CNBC request for comment.
The Saudi General Authority of Civil Aviation said the attack on King Khalid International Airport in Riyadh killed 12 people and injured 309 others, the countryâs official Saudi Gazette media outlet reported.
Colonel Turki Al-Maliki, the spokesman for the Saudi-led Coalition to Support Legitimacy in Yemen, which has been leading the fight against the Houthis, described the attack as a âwar crime.â
âTherefore, the Joint Forces Command of the Coalition will respond decisively to this terrorist attack in accordance with the Customary International Humanitarian Law,â Al-Maliki said in a post on X.
It was the second deadly assault on Riyadhâs airport in less than a week.
Three Saudi nationals, including a pilot, were killed in attacks on the facility by Iran-backed Houthi militants on Thursday.
Following Saturdayâs attack, the Houthis renewed their warning against using Saudi airports.
âWe renew our warning to all airlines, experts, employees, workers and travellers against using Saudi airports and airspace, as they are vulnerable to attack and have become a theatre of operations for our forces, with the exception of the airports in (the holy cities of) Mecca and Medina,â the Houthis said in a post on X.
Saudi Arabia, a key U.S. ally in the Middle East, intervened in Yemenâs civil war between the Houthis and its internationally recognized government after the group seized the Yemeni capital Sanaa in 2014.
Last month, the Trump administration approved the potential $24.3 billion sale of nearly 50 F-35 warplanes to Saudi Arabia in what was seen as a major boost for the kingdom as it faces intensifying attacks from the Houthis. The sale is under congressional review.
International energy conference still on
The Saudi energy ministry said a long-planned international energy conference will still take place in Riyadh on Sunday, Reuters reported.
The five-day WPC Energy Congress is taking place at a convention center near King Khalid airport. State television told Reuters that more than 70 ministers, 300 company executives and representatives of more than 25 international energy organizations have confirmed their attendance, though it was not clear whether the participants would attend in person or virtually.
Reuters said a ministerial meeting of the International Energy Forum is also set to take place, with its plenary session to be held behind closed doors.
Energy choke points
In addition to attacks on civil aviation, the Houthis have also been trying to choke off oil tanker traffic through the Bab el Mandeb strait, a key entry point to the Red Sea, as Iran has effectively done in the Strait of Hormuz to the north of the Arabian Peninsula.
Earlier this month, Yemeni government forces said they reclaimed the strategic port city of Mokha from the Houthis.
Energy prices have soared since the start of the Iran war, which began with U.S. and Israeli airstrikes on Iranian targets on Feb. 28, putting pressure on consumers globally.
The surge in domestic fuel prices has been a key issue for voters ahead of next monthâs U.S. midterm elections.
But that support would be expensive militarily.
âPotential U.S. involvement in the Saudi-Yemeni government air campaign to degrade Houthi ballistic missile capabilities would mark the first direct U.S. military action against the group since the conclusion of Operation Rough Rider in May 2025,â according to the Critical Threats Project, part of the American Enterprise Institute think tank.
The offensive aimed to suppress the Houthisâ capabilities, but recent attacks show the group has regrouped.
âAfter seven months of war, there are questions about the U.S. capacity to wage a sustained campaign against the Houthis, return to combat against Iran if necessary, and prepare for contingencies in other parts of the world, notably East Asia,â Steven Cook, an expert on Arab and Turkish politics at the Council on Foreign Relations think tank, wrote last month.
Meanwhile, the United Kingdomâs defense secretary said his government is also examining how to support Saudi Arabia.
âIâve spoken to my Saudi counterpart [Khalid bin Salman] on a number of occasions in recent weeks to look at what more we can do to support Saudi Arabia, and Iâm afraid last night explains precisely why we are providing that support,â Wes Streeting said in an interview on BBC television on Sunday.
Streeting said the U.K. is not getting involved in offensive operations âat this stage.â
âWeâve always been clear that there isnât a military solution to this conflict,â Streeting added.
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