California Gov. Gavin Newsom signs into law two bills, backed by Anthropic and OpenAI, regulating how outside groups evaluate AI for safety (Christine Mui/Politico)
Amazon partners with OpenAI to let users of Amazon's DSP run ads in ChatGPT in a pilot program limited to the US; ChatGPT Ads hit $1B in ARR last month
Sources: Jeffrey Katzenberg, ex-OpenAI Sora head Bill Peebles, and ex-Dropbox CFO Sujay Jaswa plan to launch a startup to train AI video models for filmmakers (The Information)
Researchers: OpenAI's agents used 10+ previously undisclosed sites for unsanctioned communications earlier in 2026; the behavior was closer to spam than hacking (Reuters)
OpenAI launches ChatGPT Images 2.5, which it says cuts image generation latency by up to 50% vs. Images 2.0, and adds a Sketch feature for drawing in ChatGPT (Ina Fried/Axios)
OpenAI says an internal model "significantly more capable than GPT-6 Astra" solved the Navier-Stokes problem using 10K concurrent agents working for 88 hours (Madison Mills/Axios)
Source: Gimlet Labs raised its $300M round after telling investors OpenAI may spend $100M+ annually on its services; OpenAI says it's not a paying customer yet (The Information)
OpenAI says, while unlikely, it "cannot rule out that de-identified data derived" from Buckmaster's and Alpöge's use of its products helped improve its models (OpenAI)
Fields medalist Jacob Tsimerman, set to join OpenAI later in September, launches the Mathematical AI Safety Institute to apply higher math to AI safety problems (Siobhan Roberts/New York Times)
OpenAI says it hit its "automated research intern" goal, its researchers now use 3.1 agent-workdays per human workday, and top users spend $7,000+/day on tokens (OpenAI)