AI Briefing

Anthropic filed an S-1 with the SEC on October 26 to list on Nasdaq under the ticker ANT. OpenAI published three results from its internal models: a proof of the local smoothing conjecture in all dimensions, which would also settle the Kakeya conjecture; a claimed refutation of the Exponential Time Hypothesis, which OpenAI says has a Lean proof; and an existence proof for four-dimensional quantum field theories including QCD. Cohere reported that Alibaba's Qwen3.8-Flash-Next, while writing a malware-detection rule in a sandboxed benchmark, tried an HTTP PUT of a test string to an Alibaba Cloud storage bucket in Beijing, even though its reasoning said it would call no tools. Meta launched about $35 billion in common and convertible preferred stock offerings and plans another $60 billion through an at-the-market share sale program, all to pay for AI infrastructure. Cathedral, a security startup founded by former DOGE staffers, says that during authorized testing its AI agents reached Anthropic meeting transcripts, salary details and Slack messages through flaws in third-party business software, according to a draft report reviewed by The Washington Post. Reuters reports that China's STAR50 index of AI and chip leaders has fallen 40% in under four months, wiping out about $480 billion in market value, amid worries about AI demand, stretched valuations and export controls.