Simon Willison’s Weblog

Believing AI vendors who promise you that they won't train on your data is a huge competitive advantage these days.

Posted 14th April 2025 at 4:30 pm

Recent articles

JustHTML is a fascinating example of vibe engineering in action - 14th December 2025
OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025

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