Simon Willison’s Weblog

Knockbrex Castle. I’m off to a Scottish castle with 11 fellow geeks for /dev/fort—offline for six days, back next Saturday.

Posted 30th May 2009 at 10:51 am

Recent articles

My Lethal Trifecta talk at the Bay Area AI Security Meetup - 9th August 2025
The surprise deprecation of GPT-4o for ChatGPT consumers - 8th August 2025
GPT-5: Key characteristics, pricing and model card - 7th August 2025

castle 1 devfort 5 holiday 2 knockbrex 1 offline 10 scotland 1 sedf 1

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