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

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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