OpenAI DevDay 2026 live blog
Simon Willison’s Weblog
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OpenAI DevDay 2026 live blog
29th September 2026
I’m at OpenAI DevDay today, in Fort Mason, San Francisco. Same as last year I’ll be live blogging the keynote and some other notes during the day.
OpenAI gave me a free ticket and a seat in the “creator” area for the keynote.
09:27 I'm in the room for the keynote, which starts in half an hour.
This year I vibe-coded a system for more easily adding photos to my live blog. I intended to do that using Codex Cloud (I built it on my phone on the way to the venue) but ran into problems with that and switched to Claude Code for web instead.
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This is OpenAI DevDay 2026 live blog by Simon Willison, posted on 29th September 2026.
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