OpenAI DevDay 2026
OpenAI flagship developer conference where new APIs, models, and platform capabilities are unveiled to the builder community.
About this event
OpenAI DevDay is the annual one day developer conference hosted by OpenAI to showcase new platform capabilities, model releases, and the ecosystem of products being built on the OpenAI API. The inaugural 2023 event in San Francisco introduced GPTs, the Assistants API, and GPT-4 Turbo to a thousand developers in a single keynote that reshaped the AI builder landscape overnight. The 2026 edition returns to San Francisco on September 29, continuing the format of a keynote heavy single day packed with announcements, technical sessions, and demos.
The programming centers on a Sam Altman keynote, deep dive sessions on the latest model and API capabilities, hands on workshops, and a curated expo of partner integrations. Past DevDays have launched Custom GPTs, the GPT Store, the Realtime API, structured outputs, the Responses API, and Sora developer access, making the conference essential viewing for anyone building on OpenAI infrastructure. Attendance is intentionally capped to keep the experience intimate, with invitations skewing toward active API customers, startup founders, and enterprise engineering leaders.
The attendee mix is heavily weighted toward developers actually shipping products on OpenAI, plus journalists, investors, and partner companies. Tickets sell out within minutes of opening and unlock not just the conference itself but also the legendary after parties across the SF startup ecosystem the same week. For developers betting on the OpenAI platform, DevDay is the single most important event on the calendar each year, the day when next year roadmap effectively becomes public.