Simon Willison quotes Romain Huet on OpenAI's GPT-5.5 unifying Codex and main model for agentic coding.
A quote from Romain Huet confirming OpenAI won't release a separate GPT-5.5-Codex model, as coding capabilities are unified.
Guide to prompting GPT-5.5 with tips from OpenAI, including migration advice and a trick for multi-step tasks.
A guide on prompting GPT-5.5, including tips for multi-step tasks, migration advice, and starting fresh with new prompts.
Release notes for llm 0.31, a command-line tool for accessing large language models, featuring GPT-5.5 support and new options.
Release notes for llm 0.31, a command-line tool for accessing large language models, featuring GPT-5.5 support and new options.
Exploring GPT-5.5 via the Codex backdoor API, including a new LLM plugin for using ChatGPT subscriptions with Codex.
GPT-5.5 is released via Codex; a new LLM plugin uses the semi-official backdoor API to access it through OpenAI subscriptions.
