Simon Willison’s Weblog

Multi-threaded JavaScript (with Rhino). Good tutorial on using Rhino to do cool things with JavaScript.

Posted 6th April 2005 at 6:42 am

Recent articles

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025
Useful patterns for building HTML tools - 10th 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