Simon Willison’s Weblog

The Acid2 Test: The Smile and Row Fourteen. Safari looks set to beat the rest to full Acid2 compliance.

Posted 18th April 2005 at 2:42 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

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe