This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
Tim Kellogg
timkellogg.me
did:plc:ckaz32jwl6t2cno6fmuw2nhn
GPT-5.3-Codex
- Cheaper (fewer tokens, higher intelligence)
- you can interrupt it
- big focus on coding
- first LLM to be used extensively in its own development
https://openai.com/index/introducing-gpt-5-3-codex/
2026-02-05T18:41:22.351Z