Welcome back! A Beijing brain surgeon let ChatGPT grind for 16 hours and walked away with a proof mathematicians had chased since 2004. OpenAI claimed a Cold War uranium site for its next data center. China's GLM-5.3 dug up a software bug planted in 1981, and Higgsfield quadrupled its value in seven months.
In today's Generative AI Newsletter:
ChatGPT: How did a brain surgeon end a 22-year math hunt in one run?
OpenAI: What is it building where America enriched uranium?
Z.ai: How old is the oldest bug its model just dug up?
Higgsfield: What convinced Goldman to back a 4x jump in seven months?
A brain surgeon beat 22 years of math with ChatGPT
Jin Shanmu is a neurosurgery resident in Beijing. His degree is in geology and every bit of math past the basics is self-taught, picked up for his research on brain ultrasounds.
Last month he proved Crouzeix's conjecture, a matrix problem that had stumped mathematicians since 2004.
His method was a 16-hour autonomous run of GPT-5.6 Sol in ChatGPT Work. He cut the model off from the internet, told it to split into subagents that chase different strategies and audit each other's proofs, then walked away.
The proof survived. Michel Crouzeix, who posed the problem, checked it himself and believes it's correct, with formal peer review still pending. The exact prompt sits on GitHub, adapted from one OpenAI used on another open conjecture.
Eight days later two mathematicians posted an independent proof. They disclosed using ChatGPT too.
ChatGPT keeps making math history every other month. Can’t wait for it to make breakthroughs in biology as well.
OpenAI's new data center sits on a Cold War uranium site
OpenAI said Monday it will take about 8 gigawatts of computing at a planned Ohio data center. The site is the former Portsmouth plant in Pike County, where America enriched uranium through the Cold War.
SB Energy builds and owns the campus, OpenAI leases it for 20 years and Nvidia is putting $1.5 billion into the developer. Every chip inside will be Nvidia's.
The project promises 35,000 construction jobs through 2032, 2,500 permanent roles and an $80 million community fund. OpenAI says the grid upgrades stay off Ohio power bills.
There's a student angle too. About 844,000 Ohio college students get $100 each in Codex credits this school year, up to $84 million in all.
The first 800 megawatts are expected in 2028. The rest needs new gas plants that don't exist yet.
Sounds like a the start of a movie that doesn’t end well for humanity. Let’s hope it’s just a coincidence.
China's GLM-5.3 dug up a bug from 1981
Z.ai, the Chinese lab behind the GLM models, shipped GLM-5.3. Z.ai calls it the strongest open-weights coder, and the release notes admit its hacking skills grew faster than the team expected.
On CyberGym, the benchmark for finding software vulnerabilities, it scored 84.5 percent. That's ahead of Anthropic's Mythos 5 and OpenAI's GPT-5.6 Sol, the two best closed models on the test.
Then Z.ai pointed it at real code alongside Chinese security teams. It surfaced 2,436 vulnerabilities across 269 open-source projects, 1,097 of them rated high or critical. The oldest bug had been sitting in a codebase since 1981, and the average one went unnoticed for 26 years.
Everything runs through a public disclosure ledger, with most findings still under embargo. The weights go public in two weeks, after safety checks.
Higgsfield quadrupled to $5.4 billion in seven months
Higgsfield, the AI video startup started by a former Snap executive, raised $400 million on Monday at a $5.4 billion valuation. In January it was worth $1.3 billion.
Their revenue does the talking. The company says it's annualizing $700 million, up from roughly $20 million a year ago, with 30 million people using it to turn prompts and images into cinematic video.
DST Global led the round, with Goldman Sachs and Intel Capital among the backers. Scarce compute drove the raise, the company says, and the new money reserves capacity.
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Everything else you shouldn't miss
GPT Astra is reportedly days away: leak accounts say OpenAI's biggest release since GPT-4.5 could land this week, built on its largest pretraining run yet, and expanded security checks could still delay it.
Stripe bought the router 8 million people use to reach 400 AI models: Bloomberg says the payments company finalized a deal for OpenRouter at more than $7 billion, about five times the startup's May valuation.
Meta put a local agent model under Apache 2.0: Muse Glimmer is a 30B model built for always-on agents whose 4-bit version runs on a single high-end GPU, with weights live on Hugging Face and no commercial restrictions.
The Information profiled the adviser behind Anthropic's CEO: the outlet reports Dario Amodei's wife Cami Clark pitched Jeffrey Epstein on funding an adult-film startup years before they married and brought Anthropic early investor Eric Schmidt.
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