Simon Willison’s Weblog

What the heck is HTML 5? Slides from my five minute HTML 5 talk at Oxford Geek Night 2.

Posted 12th April 2007 at 2:41 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

html 88 oxfordgeeknight2 7 oxford-geek-nights 20 speaking 117 my-talks 89 whatwg 16

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