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OpenAI DevDay 2026 Opens in San Francisco With Sam Altman Keynote Set for 10 a.m. PT

September 29, 2026 at 12:57 EDT

Software Dev & Coding
AI Agents

OpenAI DevDay 2026 begins today in San Francisco, with the company positioning the event as its main annual forum for developers building on its models, APIs and agent tools. The opening keynote is scheduled for 10:00 a.m. Pacific time on September 29, featuring Sam Altman, and will be livestreamed for free.

September 29, 2026 · OpenAI

DevDay opens for builders

OpenAI's developer conference begins in San Francisco with a Sam Altman keynote, technical sessions, hands-on demos and a global Exchange series to follow.

10:00

Keynote, PT

$650

Registration

Exchange cities

17:00

Keynote, UTC

From one main stage to eight city follow-ups

1San Francisco event

8Exchange cities

The confirmed follow-up series expands the developer program to Bengaluru, Tokyo, Seoul, Berlin, Paris, London, Sao Paulo and Mexico City.

8:00 a.m.

Breakfast

10:00 a.m.

Opening keynote

11:15-3:30

Breakouts

4:45-7:00

Reception

What builders want

Practical model updates, API changes, agent frameworks and workflows that can move quickly into production.

What they are watching

Predictable costs, stable limits and details that go beyond launch-day demonstrations.

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