Simon Willison’s Weblog

14th April 2025

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

The Pelican comparison grid for Astra is pretty interesting - 4th September 2026
OpenAI's rogue agents were caught communicating via public wikis - 4th September 2026
Claude's new system prompt really doesn't want to reproduce song lyrics - 2nd September 2026

This is a note by Simon Willison, posted on 14th April 2025.

ai 2,216 generative-ai 1,964 llms 1,931

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