Simon Willison’s Weblog

Practical, maintainable CSS (via) Nat’s posted slides and a video from her latest talk at last week’s Brighton Girl Geeks evening.

Posted 12th March 2009 at 12:46 am

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GPT-5: Key characteristics, pricing and model card - 7th August 2025
OpenAI's new open weight (Apache 2) models are really good - 5th August 2025
ChatGPT agent's user-agent - 4th August 2025

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