OpenAI hosts DevDay 2026 in San Francisco
Simon Willison, a tech journalist, attended and live-blogged the keynote and other sessions. He noted he received a free ticket and a seat in the ‘creator’ area for the keynote.
Key points
- Simon Willison live-blogged the event and received a free ticket and a ‘creator’ seat
- Willison switched from Codex Cloud to Claude Code for web to add photos to his live blog
Willison mentioned using Claude Code for web to add photos to his live blog after encountering issues with Codex Cloud. The event follows recent model releases, including Claude Opus 5.5, GPT-6 Sol, and GPT-6 Luna, as well as a price war in LLMs. No specific announcements or details from the event itself are included in the article.
Model pages: Claude Opus 5.5 → · GPT-6 Sol → · GPT-6 Luna →
The story so far
2 episodes →- OpenAI hosts DevDay 2026 in San Franciscothis story
OpenAI DevDay 2026 live blog
Simon Willison · 29 September 2026
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