Simon Willison’s Weblog

Sun OpenID IdP: protocol and implementation review. Sun employees are posting lots of useful insights gathered during the implementation of their OpenID provider.

Posted 22nd September 2007 at 8:22 pm

Recent articles

The Summer of Johann: prompt injections as far as the eye can see - 15th August 2025
Open weight LLMs exhibit inconsistent performance across providers - 15th August 2025
LLM 0.27, the annotated release notes: GPT-5 and improved tool calling - 11th August 2025

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