Simon Willison’s Weblog

A Hack for Europe! Signups are now open for Hack Day Europe, on June 16th and 17th. You need to apply for an invitation.

Posted 18th April 2007 at 11:24 pm

Recent articles

My Lethal Trifecta talk at the Bay Area AI Security Meetup - 9th August 2025
The surprise deprecation of GPT-4o for ChatGPT consumers - 8th August 2025
GPT-5: Key characteristics, pricing and model card - 7th August 2025

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