OpenAI Codex newsletters

NewsletterFIT tracks 3 newsletters that cover OpenAI Codex as a primary topic, all with posts in the last 90 days. By publicly shown subscriber count, the largest are Simon Willison’s Newsletter (73K) and 👨‍💻👩‍💻 Cosas de Freelance (14K).

Updated Oct 31, 2026 · sorted by publicly shown subscribers · methodology

  1. 1
    Simon Willison’s Newsletter73K subscribers

    SubstackWeekly · last post 18 days ago

    Likely audience: AI researchers

  2. 2
    👨‍💻👩‍💻 Cosas de Freelance 14K subscribers

    SubstackEvery two weeks · last post 18 days ago

    Likely audience: Freelancers

  3. 3
    CyberMohr—

    GhostMonthly or less · last post 21 days ago

    Likely audience: DevOps engineers

Latest posts from these newsletters

Browse all topics