Simon Willison’s Weblog

If It's Not Nailed Down, Steal It. Pattern Matching, S-Expressions, and Domain Specific Languages in Ruby.

Posted 18th August 2006 at 10:18 am

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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