Original: Simon Willison · 07/03/2026
Summary
OpenAI has launched a six-month ChatGPT Pro offer for maintainers of popular open source projects, similar to Anthropic’s Claude Max initiative.Key Insights
“six months of free Claude Max for maintainers of popular open source projects” — Referring to Anthropic’s offer for open source project maintainers.
“six months of ChatGPT Pro with Codex and ‘conditional access to Codex Security’” — Describing OpenAI’s new offer for core maintainers.
“the application form does ask for ‘information such as GitHub stars, monthly downloads, or why the project is important to the ecosystem.’” — Highlighting the criteria for applying for the ChatGPT Pro offer.
Topics
Full Article
7th March 2026 - Link Blog Codex for Open Source (via) Anthropic announced six months of free Claude Max for maintainers of popular open source projects (5,000+ stars or 1M+ NPM downloads) on 27th February. Now OpenAI have launched their comparable offer: six months of ChatGPT Pro (same $200/month price as Claude Max) with Codex and “conditional access to Codex Security” for core maintainers. Unlike Anthropic they don’t hint at the exact metrics they care about, but the application form does ask for “information such as GitHub stars, monthly downloads, or why the project is important to the ecosystem.”Related Articles
Free Claude Max for (large project) open source maintainers
Simon Willison · reference · 75% similar
Introducing the Codex app
Simon Willison · explanation · 62% similar
[AINews] GPT 5.4: SOTA Knowledge Work -and- Coding -and- CUA Model, OpenAI is so very back
Swyx · explanation · 61% similar
Originally published at https://simonwillison.net/2026/Mar/7/codex-for-open-source/#atom-everything.