OpenAI Account Posts GPT-6 Astra Hackathon Invite

The official @OpenAIDevs account shared details for the GPT-6 Astra Hackathon SF. The post invites developers and technical founders to bring an idea or prototype, work with local developers, receive hands-on support from the OpenAI team, and prepare a live demo. The event is listed for Tuesday, Sep 8, 2026 in San Francisco. A linked page on cerebralvalley.ai describes the gathering as a competition to build projects with GPT-6 Astra. The message includes a registration link and positions the session as an in-person opportunity hosted with the OpenAI team.