OpenAI DevDay
DevDay is the developer conference brand run by OpenAI for engineers, technical founders, and researchers building with OpenAI’s interfaces and models. According to the official event page, the program consists of technical sessions, hands-on demos and workshops, and time to connect with other developers. OpenAI’s models and APIs themselves are covered in entries such as the GPT model family.
Editions and major announcements
- November 6, 2023: the first DevDay. In its official blog post, OpenAI announced GPT-4 Turbo — a 128k context window, knowledge updated to April 2023, and lower input and output prices than GPT-4 — along with the Assistants API (described as “our first step towards helping developers build agent-like experiences”), DALL·E 3 in the Images API, text-to-speech, and Copyright Shield.
- October 6, 2025: DevDay showcased the Agent Builder platform, with a visual drag-and-drop interface for agentic workflows.
- September 29, 2026: the official event page shows this DevDay at Fort Mason in San Francisco, with an opening keynote by Sam Altman livestreamed free for everyone and in-person attendance by application and ticket. OpenAI also runs DevDay Exchanges in Bengaluru, Tokyo, Seoul, Paris, Berlin, London, São Paulo, and Mexico City.
Schedules and registration for each edition should be read from the current information on devday.openai.com.
Discussion in the show
In Weekly #004’s chapter “模型安全性与新的斩杀线” (Model safety and the new kill line), recorded shortly before DevDay, Orange says “然后 OpenAI 下周要那个 Dev Day” — OpenAI’s DevDay is next week — and adds, “据说他们就准备了很多东西，估计还有一些降价、各种东西配合要打一打,” expecting announcements and price cuts. This is anticipation expressed at recording time, not a report of what happened; any price changes should be checked against OpenAI’s official releases. The chapter is in the Chinese transcript.
Frequently asked questions
What is OpenAI DevDay?
DevDay is OpenAI’s annual developer conference, where the company announces new models, APIs, and developer tools through technical sessions, product demos, and workshops. Event information lives at devday.openai.com.
When was the first OpenAI DevDay?
The first DevDay was held on November 6, 2023. That day, OpenAI published the announcement of GPT-4 Turbo, the Assistants API, DALL·E 3 in the Images API, and text-to-speech, among other developer products.
When and where is DevDay 2026?
The official event page shows DevDay 2026 on September 29, 2026, at Fort Mason in San Francisco, with the opening keynote by Sam Altman livestreamed free; in-person attendance requires an application and a ticket. The series also includes DevDay Exchanges in eight cities including Bengaluru, Tokyo, and Seoul.
How do I attend DevDay?
For the 2026 edition: in-person attendance required an application on the official event page, with tickets after invitation, while the opening keynote was livestreamed free for everyone. Current registration channels and prices should be read from devday.openai.com.