Simon Willison’s Weblog

21st February 2026

We’ve made GPT-5.3-Codex-Spark about 30% faster. It is now serving at over 1200 tokens per second.

— Thibault Sottiaux, OpenAI

Posted 21st February 2026 at 1:30 am

Recent articles

Stateless MCP has recaptured my interest (and inspired mcp-explorer and datasette-mcp) - 31st July 2026
OpenAI’s accidental cyberattack against Hugging Face is science fiction that happened - 22nd July 2026
A Fireside Chat with Cat and Thariq from the Claude Code team - 21st July 2026

This is a quotation collected by Simon Willison, posted on 21st February 2026.

ai 2,159 openai 440 generative-ai 1,911 llms 1,878 llm-performance 16