OpenAI DevDay 2026 kicks off in San Francisco
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Developer and author Simon Willison is live blogging from OpenAI DevDay 2026 in Fort Mason, San Francisco, on September 29, 2026. CEO Sam Altman opened the event by welcoming attendees and promising the best DevDay yet. Willison noted he used Claude Code for web to build a photo-uploading system for his live blog after running into issues with Codex Cloud.
Continue in the app — vote & join in ➔Source: Simon Willison (AI) · via ahirlevel.hu