OpenAI presented GPT-6 Astra as a more capable intelligence generation; later internal systems would be cited in the Navier–Stokes announcement.
On September 3, 2026, OpenAI communicated GPT-6 Astra as a new model generation. The public message emphasized general capabilities and pace of progress.
Days later, in the Navier–Stokes announcement, the company would say it used an internal system significantly more capable than GPT-6 Astra for mathematical research.
Astra marks the immediate product context before the “AI for Millennium Problems” moment.
Per a Reuters exclusive dated around September 18–19, 2026, Anthropic is considering releasing a new AI model ahead of its expected IPO to counter OpenAI’s GPT-6 Astra business traction, even as CEO Dario Amodei urges the industry to slow the frontier.
OpenAI classified GPT-6 Astra as its first system to hit the Preparedness Framework’s Critical cybersecurity threshold, while Microsoft announced general availability in Foundry with hardened enterprise controls.
Engineer Carter Church used GPT-6 Astra to fully read a coded letter from March 1809 addressed to General Auguste de Marmont that had gone unread for 217 years; Satoshi Tomokiyo's Cryptiana repository now lists it as solved after reviewing the solution.