With the popularity of AI coding tools rising among some software developers, their adoption has begun to touch every aspect of the process, including the improvement of AI coding tools themselves.

In interviews with Ars Technica this week, OpenAI employees revealed the extent to which the company now relies on its own AI coding agent, Codex, to build and improve the development tool. “I think the vast majority of Codex is built by Codex, so it’s almost entirely just being used to improve itself,” said Alexander Embiricos, product lead for Codex at OpenAI, in a conversation on Tuesday.

Codex, which OpenAI launched in its modern incarnation as a research preview in May 2025, operates as a cloud-based software engineering agent that can handle tasks like writing features, fixing bugs, and proposing pull requests. The tool runs in sandboxed environments linked to a user’s code repository and can execute multiple tasks in parallel. OpenAI offers Codex through ChatGPT’s web interface, a command-line interface (CLI), and IDE extensions for VS Code, Cursor, and Windsurf.

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If you’ve been too busy floating in your new WoW house to take part in this year’s Ars Technica Charity Drive sweepstakes, don’t worry. You still have time to donate to a good cause and get a chance to win your share of over $4,000 worth of swag (no purchase necessary to win).

In the first two days or so of the drive, over 200 readers have contributed over $11,000 to either the Electronic Frontier Foundation or Child’s Play as part of the charity drive (Child’s Play has a roughly 60/40 donation lead at the moment). That’s still a long way off from 2020’s record haul of over $58,000, but there’s still plenty of time until the Charity Drive wraps up on Friday, January 2, 2026.

That doesn’t mean you should put your donation off, though. Do yourself and the charities involved a favor and give now while you’re thinking about it.

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Google has increasingly moved toward keeping features locked to its hardware products, but the Translate app is bucking that trend. The live translate feature is breaking out of the Google bubble with support for any earbuds you happen to have connected to your Android phone. The app is also getting improved translation quality across dozens of languages and some Duolingo-like learning features.

The latest version of Google’s live translation is built on Gemini and initially rolled out earlier this year. It supports smooth back-and-forth translations as both on-screen text and audio. Beginning a live translate session in Google Translate used to require Pixel Buds, but that won’t be the case going forward.

Google says a beta test of expanded headphone support is launching today in the US, Mexico, and India. The audio translation attempts to preserve the tone and cadence of the original speaker, but it’s not as capable as the full AI-reproduced voice translations you can do on the latest Pixel phones. Google says this feature should work on any earbuds or headphones, but it’s only for Android right now. The feature will expand to iOS in the coming months. Apple does have a similar live translation feature on the iPhone, but it requires AirPods.

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Dozens of Ukrainian civilians filed a series of lawsuits in Texas this week, accusing some of the biggest US chip firms of negligently failing to track chips that evaded export curbs. Those chips were ultimately used to power Russian and Iranian weapon systems, causing wrongful deaths last year.

Their complaints alleged that for years, Texas Instruments (TI), AMD, and Intel have ignored public reporting, government warnings, and shareholder pressure to do more to track final destinations of chips and shut down shady distribution channels diverting chips to sanctioned actors in Russia and Iran.

Putting profits over human lives, tech firms continued using “high-risk” channels, Ukrainian civilians’ legal team alleged in a press statement, without ever strengthening controls.

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Modern bionic hand prostheses nearly match their natural counterparts when it comes to dexterity, degrees of freedom, and capability. And many amputees who tried advanced bionic hands apparently didn’t like them. “Up to 50 percent of people with upper limb amputation abandon these prostheses, never to use them again,” says Jake George, an electrical and computer engineer at the University of Utah.

The main issue with bionic hands that drives users away from them, George explains, is that they’re difficult to control. “Our goal was making such bionic arms more intuitive, so that users could go about their tasks without having to think about it,” George says. To make this happen, his team came up with an AI bionic hand co-pilot.

Micro-management issues

Bionic hands’ control problems stem largely from their lack of autonomy. Grasping a paper cup without crushing it or catching a ball mid-flight appear so effortless because our natural movements rely on an elaborate system of reflexes and feedback loops. When an object you hold begins to slip, tiny mechanoreceptors in your fingertips send signals to the nervous system that make the hand tighten its grip. This all happens within 60 to 80 milliseconds—before you even consciously notice. This reflex is just one of many ways your brain automatically assists you in dexterity-based tasks.

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Rian Johnson has another Benoit Blanc hit on his hands with Wake Up Dead Man, in which Blanc tackles the strange death of a fire-and-brimstone parish priest, Monseigneur Jefferson Wicks (Josh Brolin). It’s a classic locked-room mystery in a spookily Gothic small-town setting, and Johnson turned to cinematographer Steve Yedlin (Looper, The Last Jedi) to help realize his artistic vision.

(Minor spoilers below but no major reveals.)

Yedlin worked on the previous two Knives Out installments. He’s known Johnson since the two were in their teens, and that longstanding friendship ensures that they are on the same page, aesthetically, from the start when they work on projects.

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President Trump issued an executive order yesterday attempting to thwart state AI laws, saying that federal agencies must fight state laws because Congress hasn’t yet implemented a national AI standard. Trump’s executive order tells the Justice Department, Commerce Department, Federal Communications Commission, Federal Trade Commission, and other federal agencies to take a variety of actions.

“My Administration must act with the Congress to ensure that there is a minimally burdensome national standard—not 50 discordant State ones. The resulting framework must forbid State laws that conflict with the policy set forth in this order… Until such a national standard exists, however, it is imperative that my Administration takes action to check the most onerous and excessive laws emerging from the States that threaten to stymie innovation,” Trump’s order said. The order claims that state laws, such as one passed in Colorado, “are increasingly responsible for requiring entities to embed ideological bias within models.”

Congressional Republicans recently decided not to include a Trump-backed plan to block state AI laws in the National Defense Authorization Act (NDAA), although it could be included in other legislation. Sen. Ted Cruz (R-Texas) has also failed to get congressional backing for legislation that would punish states with AI laws.

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Sometimes, downing an energy drink can feel like refueling your battery. But with too much, that jolt can turn into a catastrophic surge that fries the wiring and blows a fuse. That was the unfortunate and alarming case for a man in the UK several years ago, according to a case report this week in BMJ Case Reports.

The man, who was in his 50s and otherwise healthy, showed up at a hospital after the entire left side of his body abruptly went numb and he was left with clumsy, uncoordinated muscle movements (ataxia). His blood pressure was astonishingly high, at 254/150 mm Hg. For context, a normal reading is under 120/80, while anything over 180/120 is considered a hypertensive crisis, which is a medical emergency.

The man had suffered a mild stroke, and his extremely high blood pressure was an obvious factor. But why his blood pressure had reached stratospheric heights was far less obvious to his doctors, according to the retrospective case report written by Martha Coyle and Sunil Munshi of Nottingham University Hospital.

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Back in April, District Court Judge Yvonne Gonzalez Rogers delivered a scathing judgment finding that Apple was in “willful violation” of her 2021 injunction intended to open up iOS App Store payments. That contempt of court finding has now been almost entirely upheld by the Ninth Circuit Court of Appeals, a development that Epic Games’ Tim Sweeney tells Ars he hopes will “do a lot of good for developers and start to really change the App Store situation worldwide, I think.”

The ruling, signed by a panel of three appellate court judges, affirmed that Apple’s initial attempts to charge a 27 percent fee to iOS developers using outside payment options “had a prohibitive effect, in violation of the injunction.” Similarly, Apple’s restrictions on how those outside links had to be designed were overly broad; the appeals court suggests that Apple can only ensure that internal and external payment options are presented in a similar fashion.

The appeals court also agreed that Apple acted in “bad faith” by refusing to comply with the injunction, rejecting viable, compliant alternatives in internal discussions. And the appeals court was also not convinced by Apple’s process-focused arguments, saying the district court properly evaluated materials Apple argued were protected by attorney-client privilege.

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For years, Sen. Ron Johnson has been spreading conspiracy theories and misinformation about COVID-19 and the safety of vaccines.

He’s promoted disproven treatments for COVID-19 and claimed, without evidence, that athletes are “dropping dead on the field” after getting the COVID-19 vaccination. Now the Wisconsin politician is endorsing a book by a discredited doctor promoting an unproven and dangerous treatment for autism and a host of ailments: chlorine dioxide, a chemical used for disinfecting and bleaching.

The book is “The War on Chlorine Dioxide: The Medicine that Could End Medicine” by Dr. Pierre Kory, a critical care specialist who practiced in Wisconsin hospitals before losing his medical certification for statements advocating using an antiparasite medication to treat COVID-19. The action, he’s said, makes him unemployable, even though he still has a license.

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A startup established three years ago to churn out a new class of high-power satellites has raised $250 million to ramp up production at its Southern California factory.

The company, named K2, announced the cash infusion on Thursday. K2’s Series C fundraising round was led by Redpoint Ventures, with additional funding from investment firms in the United States, the United Kingdom, and Germany. K2 has now raised more than $400 million since its founding in 2022 and is on track to launch its first major demonstration mission next year, officials said.

K2 aims to take advantage of a coming abundance of heavy- and super-heavy-lift launch capacity, with SpaceX’s Starship expected to begin deploying satellites as soon as next year. Blue Origin’s New Glenn rocket launched twice this year and will fly more in 2026 while engineers develop an even larger New Glenn with additional engines and more lift capability.

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Smart TVs can feel like a dumb choice if you’re looking for privacy, reliability, and simplicity.

Today’s TVs and streaming sticks are usually loaded up with advertisements and user tracking, making offline TVs seem very attractive. But ever since smart TV operating systems began making money, “dumb” TVs have been hard to find.

In response, we created this non-smart TV guide that includes much more than dumb TVs. Since non-smart TVs are so rare, this guide also breaks down additional ways to watch TV and movies online and locally without dealing with smart TVs’ evolution toward software-centric features and snooping. We’ll discuss a range of options suitable for various budgets, different experience levels, and different rooms in your home.

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Protecting children from the dangers of the online world was always difficult, but that challenge has intensified with the advent of AI chatbots. A new report offers a glimpse into the problems associated with the new market, including the misuse of AI companies’ large language models (LLMs).

In a blog post today, the US Public Interest Group Education Fund (PIRG) reported its findings after testing AI toys (PDF). It described AI toys as online devices with integrated microphones that let users talk to the toy, which uses a chatbot to respond.

AI toys are currently a niche market, but they could be set to grow. More consumer companies have been eager to shoehorn AI technology into their products so they can do more, cost more, and potentially give companies user tracking and advertising data. A partnership between OpenAI and Mattel announced this year could also create a wave of AI-based toys from the maker of Barbie and Hot Wheels, as well as its competitors.

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Welcome to Edition 8.22 of the Rocket Report! The big news this week concerns the decision by SpaceX founder Elon Musk to take the company public, via IPO, sometime within the next 12 to 18 months. Musk confirmed this after Ars published a story on Wednesday evening. This understandably raises questions about whether a future SpaceX will be committed more to AI data centers in space or Mars settlement. However, one of the company’s founding employees, Tom Mueller, said this could benefit the company’s Mars plans. Clearly this is something we’ll be following closely.

As always, we welcome reader submissions, and if you don’t want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets as well as a quick look ahead at the next three launches on the calendar.

Avio will build solid rocket motors in Virginia. The governor of Virginia, Glenn Youngkin, announced Wednesday that Avio USA has selected his state to produce solid rocket motors for defense and commercial space propulsion purposes. Avio USA’s investment, which will be up to $500 million, is supported by its Italian parent Avio. The company’s factory will encompass 860,000 sq. feet.

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Over two decades after the release of Star Wars: Knights of the Old Republic II, a new project described as a “spiritual successor” to that seminal RPG series was announced at The Game Awards Thursday night. Star Wars: Fate of the Old Republic will be a collaboration between Lucasfilm Games and Arcanaut Studios, a new development house being launched by original KOTOR director Casey Hudson.

Hudson, who will serve as director on the new game, said in an interview with StarWars.com that he has remained in contact with Lucasfilm since the KOTOR days, in the hopes of being able to collaborate in the Star Wars universe again. “It took the right conditions to get everything to line up,” he told the site.

Calling KOTOR “one of the defining experiences of my career,” Hudson said he wants to “explore a contemporary vision” of the Star Wars universe and “deliver on the combination of player agency and immersion in Star Wars” that defined the original games. As director on the upcoming game, Hudson said he sees his role as “to gather and shape a cohesive vision that the entire team contributes to. Ensuring that everyone shares that vision and understands their part in creating it is critical to the success of a project.”

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Back in 2016, after six-and-a-half years spent working on puzzle-adventure opus The Witness, Jonathan Blow says he needed a break. He tells Ars that the project he started in The Witness’ wake was meant to serve as a quick proof of concept for a new engine and programming language he was working on. “It was supposed to be a short game,” that could be finished in “like a year and a half or two years,” he said.

Now, after nine years of development—and his fair share of outspoken, controversial statements—Blow is finally approaching the finish line on that “short game.” He said Order of the Sinking Star—which was announced Thursday via a Game Awards trailer ahead of a planned 2026 release—now encompasses around 1,400 individual puzzles that could take completionists 400 to 500 hours to fully conquer.

Jonathan Blow, seen here probably thinking about puzzles. Credit: Thekla, Inc.

“I don’t know why I convinced myself it was going to be a small game,” Blow told me while demonstrating a preview build to Ars last week. “But once we start things, I just want to do the good version of the thing, right? I always make it as good as it can be.”

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AI company Runway has announced what it calls its first world model, GWM-1. It’s a significant step in a new direction for a company that has made its name primarily on video generation, and it’s part of a wider gold rush to build new frontier of models as large language models and image and video generation move into a refinement phase, no longer an untapped frontier.

GWM-1 is a blanket term for a trio of autoregression models, each built on top of Runway’s Gen-4.5 text-to-video generation model and then post-trained with domain-specific data for different kinds of applications. Here’s what each does.

GWM Worlds

GWM Worlds offers an interface for digital environment exploration with real-time user input that affects the generation of coming frames, which Runway suggests can remain consistent and coherent “across long sequences of movement.”

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Long-time World of Warcraft players have been waiting 21 years for the new in-game housing features that Blizzard officially announced last year and which launched in early access last week. Shortly after that launch, though, players quickly discovered a way to make their houses float high above the ground by exploiting an unintended, invisible UI glitch.

Now, Blizzard says that the overwhelming response to that accidental house hovering has been so strong that it’s pivoting to integrate it as an official part of the game.

“We were going to fix flying houses to bring them back to terra firma, but you all made such awesome stuff, so we made it possible with the base UI instead,” WoW Principal Designer Jesse Kurlancheek posted on social media Tuesday. Lead Producer Kyle Hartline followed up on that announcement with some behind-the-scenes gossip: “Like no joke we had an ops channel about how to roll out the float fix but folks shared like 5 of the dopest houses and we all kinda immediately agreed this was way too cool to change,” he wrote.

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On Thursday, OpenAI released GPT-5.2, its newest family of AI models for ChatGPT, in three versions called Instant, Thinking, and Pro. The release follows CEO Sam Altman’s internal “code red” memo earlier this month, which directed company resources toward improving ChatGPT in response to competitive pressure from Google’s Gemini 3 AI model.

“We designed 5.2 to unlock even more economic value for people,” Fidji Simo, OpenAI’s chief product officer, said during a press briefing with journalists on Thursday. “It’s better at creating spreadsheets, building presentations, writing code, perceiving images, understanding long context, using tools and then linking complex, multi-step projects.”

As with previous versions of GPT-5, the three model tiers serve different purposes: Instant handles faster tasks like writing and translation; Thinking spits out simulated reasoning “thinking” text in an attempt to tackle more complex work like coding and math; and Pro spits out even more simulated reasoning text with the goal of delivering the highest-accuracy performance for difficult problems.

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Warner Bros. has been hinting all week that it was coming and finally dropped the long-awaited first extended teaser trailer for Supergirl, directed by Craig Gillespie and starring Milly Alcock in the title role.

Plans for a Supergirl movie date all the way back to 2018, but the merger that produced Warner Bros. Discovery scuttled the original concept. James Gunn and Peter Safran came in as co-CEOs of the new DC Studios and announced plans for a “soft reboot” of the DC universe, starting with this summer’s Superman. Sasha Calle played Supergirl for a brief appearance in 2023’s The Flash, but despite having signed a multi-year contract, Gunn and Safran decided to go in a different direction for their standalone film and cast Alcock (House of the Dragon) instead.

Gunn particularly wanted to distance this new version of Supergirl from earlier incarnations, especially how the character was portrayed by Melissa Benoist in the Arrowverse series that ran from 2015–2021. He wanted someone less earnest, more of a contrast to David Corenswet’s wholesome Superman. “This is a story-based medium; we want stories to be in theaters that are cool and different from each other,” Gunn said at a media briefing. “And this movie is not exactly just a female clone of Superman. It’s its own thing entirely. And with a character who’s equally worthy of this treatment.”

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