Simon Willison’s Weblog

Newsletters

The most recent issues of my newsletters.

1. 

   5 October 2026 · Substack

   OpenAI DevDay 2026 live blog

2. 3 October 2026 · Monthly newsletter · Sponsors only

   LLM digest: September 2026

   • More Fable class models
   • A pricing war
   • 3D graphics, Blender, and pixel art
   • LLMs come for mathematics
   • So many more accidental cyberattacks
   • The vulnapocalypse comes for Datasette
   • What I'm using right now
   • My software releases this month
   • 2026 in LLMs (so far)
   • That's it for September!

   Sponsor me on GitHub to read this issue early. It becomes public a month after sending.

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3. 

   28 September 2026 · Substack

   2026 in LLMs (so far)

4. 

   21 September 2026 · Substack

   Jev introduces a new shape of LLM—System One, aka Decision Models

5. 

   14 September 2026 · Substack

   Navier–Stokes, RubyGems attacked, GIS and Blender with GPT-6 Astra

6. 

   7 September 2026 · Substack

   GPT-6 Astra, Claude Fable 5.1, and yet more rogue agent attacks

7. 4 September 2026 · Monthly newsletter

   LLM digest: August 2026

8. 

   31 August 2026 · Substack

   Understanding ChatGPT Work

9. 

   23 August 2026 · Substack

   Conceptual integrity and counting lines of code

10. 

    17 August 2026 · Substack

    Qwen 3.8 27B is excellent, but it defaults to wildly overthinking things