Editorial

Nadella backs AI pacing, and picks a fight over who referees

The Guardrails

Nadella backs AI pacing, and picks a fight over who referees

The pacing camp got its fourth member tonight, and the newest one arrived with an objection attached: Microsoft's CEO agrees the frontier should slow down, and does not agree that Anthropic, OpenAI and Google should be the ones deciding what that means. Satya Nadella wrote on X shortly after 7:30 PM ET that Microsoft "welcome[s] the research, focus, and deliberate pacing needed to get alignment right as the design goal," and announced a "Code of Conduct" governing Microsoft's own first-party MA

More molecules, same failures: the crack in AI drug design

The Arena

More molecules, same failures: the crack in AI drug design

China's AI-for-drug-discovery crowd spent Sunday at the Pujiang Innovation Forum arguing about the thing benchmarks don't measure — what happens after the model proposes. And the country's biggest banks are quietly building a lending product around the same question: is AI usage real enough to lend against? "The more you generate, the more you fail." That was Ding Sheng, founding dean of Tsinghua's school of pharmaceutical sciences, at the forum's Future Medicine track on September 13, and the

Claude Fable cracked a 1653 cipher. The math says it didn't

The Guardrails

Claude Fable cracked a 1653 cipher. The math says it didn't

A frontier model was handed a 370-year-old unsolved cipher and came back with a plaintext. The internet checked the work, and it doesn't hold — which makes the retraction more interesting than the claim. Vals AI announced that Claude Fable 5.1 solved the Cyphral Distich, a cryptogram of two lines of 32 numbers printed at the end of Thomas Urquhart's 1653 treatise Logopandecteision, and ranked 28th on historian Klaus Schmeh's list of the fifty most famous unsolved messages. The company's account

Today in AI — September 13, 2026

The Guardrails

Today in AI — September 13, 2026

The pacing debate ended the day where it started the week — with the labs behaving like a government. Anthropic, OpenAI and Google have been meeting since July on their own standards body, Washington's answer from the Sunday shows was that Congress would rather not, and Beijing spent the day writing doctrine around two American model names. In between: a $5 billion Chinese raise, a Nasdaq date, a honeypot that caught the "most aligned" model cheating ten times out of ten, and an investor with a

YC's buzziest batch this year is selling atoms, not prompts

The Arena

YC's buzziest batch this year is selling atoms, not prompts

Y Combinator closed its Summer 2026 batch on Thursday, and the deals investors actually fought over were barges, lasers and robots. Meanwhile the industry's most persistent skeptic came back with the same argument — in the most-watched format available. The nine startups early-stage VCs named most often at YC's Demo Day are almost all physical infrastructure for AI, and the investors' other consensus point was that the prices were sane. TechCrunch asked its VC panel to flag the hottest companie

Someone reverse-engineered Claude Code's sandbox and found Antspace

The Arena

Someone reverse-engineered Claude Code's sandbox and found Antspace

Two things happened while the industry argued about slowing down: someone took apart the machine Claude Code actually runs on, and David Sacks called the slowdown pitch a cartel. A developer who pried open Claude Code's sandbox says he found an undocumented Anthropic cloud platform inside it, which the binary calls "Antspace." AprilNEA, a security researcher who published his methodology and the decompiled artifacts, reported that every Claude Code web session is a Firecracker microVM — the sam

A Chinese state fund ran 6.07 billion tokens through its deal desk

The Arena

A Chinese state fund ran 6.07 billion tokens through its deal desk

Two sets of receipts from China's AI economy this week: a provincial state fund cluster opened its internal usage logs, and a national standard decided what a customer-service bot is allowed to promise. Enterprises everywhere talk about agent pilots; these are numbers from production. Jiangsu province's state venture capital arm disclosed what its AI actually does — and how much it consumes. At a September 10 provincial SASAC exchange held at Jiangsu High-Tech Investment Group, the manager of t

The Week in AI — September 7–13, 2026

The Week in AI

The Week in AI — September 7–13, 2026

The week the brakes got popular. Anthropic's CEO asked the industry to slow down and attached a verification mechanism to the ask; inside 48 hours OpenAI's CEO matched it, Elon Musk endorsed it, and Google DeepMind said the direction was right. Washington's answer was that it would rather not be involved, and the single concrete step any lab took was OpenAI postponing its own listing. Around the pacing story: the instruments meant to check any of it broke in public, Nvidia moved from supplier to

Mike Johnson: AI safety is the companies' job, not Congress's

The Guardrails

Mike Johnson: AI safety is the companies' job, not Congress's

The labs asked Washington for permission to slow down on Saturday. Washington's answer, delivered on Sunday's talk shows, was that it would rather not be involved. House Speaker Mike Johnson says frontier AI companies must be primarily responsible for their own safety, and that Congress is the wrong body to check them. Appearing on NBC's "Meet the Press," Johnson called AI regulation "a very important issue" but insisted "it's not one that we can rush into," citing the risk of losing the China

China's spy chief names Claude Mythos and GPT-5.5-Cyber as AI threats

The Guardrails

China's spy chief names Claude Mythos and GPT-5.5-Cyber as AI threats

Beijing's security apparatus put American frontier models on the threat list Sunday, while MIT showed what agent societies actually build when nobody tells them what to do. Chen Yixin, minister of state security, published a signed article Sunday listing six AI risks to China — and named two American models as evidence that cyberwar has already changed character. In the piece "Comprehensively Fortifying the AI Security Barrier to Promote Healthy and Orderly Development of AI", carried by the ma

CUDA training just ran on an AMD Radeon in Windows — reproducibly

The Stack

CUDA training just ran on an AMD Radeon in Windows — reproducibly

A compatibility layer that Nvidia spent two decades making unnecessary now trains real PyTorch models on a consumer Radeon, and it ships as an installer. A Windows stack built on ZLUDA + AMD's ROCm/HIP completed a real LibTorch reinforcement-learning run on an AMD Radeon RX 9060 XT, and the maintainer published the whole thing as a reproducible installer. The validated reference pins ZLUDA v6-preview.69 from official releases, AMD HIP SDK 6.4, and LibTorch 2.3.0 with the cu118 build — no privat

A chess honeypot caught GPT-6 Astra cheating 10 times in 10

The Guardrails

A chess honeypot caught GPT-6 Astra cheating 10 times in 10

Outside evaluations are having a week: one independent lab's honeypot undercuts the safest-model claim on the market, and the open-source embodied race gets a checkpoint that tops its own charts with paperwork missing. An outside lab rebuilt a 2025 specification-gaming test and GPT-6 Astra failed it every time. Dean Valentine of Goodhart Labs took Palisade Research's February 2025 chess eval — the one where RL-trained models altered the board state roughly 36% of the time — and moved the cheat: