Simon Willison’s Weblog

Newsletters: 2026

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

11. 

    8 August 2026 · Substack

    Now we have a timeline of the OpenAI accidental attack against Hugging Face

12. 2 August 2026 · Monthly newsletter

    LLM digest: July 2026

13. 

    1 August 2026 · Substack

    Stateless MCP has recaptured my interest

14. 

    24 July 2026 · Substack

    OpenAI’s accidental cyberattack against Hugging Face is science fiction that happened

15. 

    17 July 2026 · Substack

    Kimi K3, and what we can still learn from the pelican benchmark

16. 

    10 July 2026 · Substack

    The new GPT-5.6 family: Luna, Terra, Sol

17. 

    5 July 2026 · Substack

    Have your agent record video demos of its work with shot-scraper video

18. 3 July 2026 · Monthly newsletter

    LLM digest: June 2026

19. 

    26 June 2026 · Substack

    Porting the Moebius 0.2B image inpainting model to run in the browser with Claude Code

20. 

    19 June 2026 · Substack

    Datasette Apps: Host custom HTML applications inside Datasette

21. 

    13 June 2026 · Substack

    Claude Fable is relentlessly proactive

22. 

    6 June 2026 · Substack

    Running Python code in a sandbox with MicroPython and WASM

23. 1 June 2026 · Monthly newsletter

    LLM digest: May 2026

24. 

    29 May 2026 · Substack

    I think Anthropic and OpenAI have found product-market fit

25. 

    22 May 2026 · Substack

    Datasette Agent: an AI assistant for Datasette built on LLM

26. 

    19 May 2026 · Substack

    The last six months in LLMs in five minutes

27. 

    8 May 2026 · Substack

    Vibe coding and agentic engineering are getting closer than I’d like

28. 4 May 2026 · Monthly newsletter

    LLM digest: April 2026

29. 

    1 May 2026 · Substack

    DeepSeek v4, and the end of the OpenAI/Microsoft AGI clause

30. 

    24 April 2026 · Substack

    GPT 5.5, ChatGPT Images 2.0, Qwen3.6-27B

31. 

    18 April 2026 · Substack

    Qwen3.6-35B-A3B on my laptop drew me a better pelican than Claude Opus 4.7

32. 

    10 April 2026 · Substack

    Meta’s new model is Muse Spark, and meta.ai chat has interesting new tools

33. 

    3 April 2026 · Substack

    Highlights from my conversation about agentic engineering on Lenny’s Podcast

34. 2 April 2026 · Monthly newsletter

    LLM digest: March 2026

35. 

    28 March 2026 · Substack

    Vibe coding SwiftUI apps is a lot of fun

36. 

    20 March 2026 · Substack

    Thoughts on OpenAI acquiring Astral and uv/ruff

37. 

    17 March 2026 · Substack

    Fireside chat about agentic engineering at the Pragmatic Summit

38. 

    6 March 2026 · Substack

    Can coding agents relicense open source through a “clean room” implementation of code?

39. 2 March 2026 · Monthly newsletter

    LLM digest: February 2026

40. 

    27 February 2026 · Substack

    Agentic Engineering Patterns

41. 

    19 February 2026 · Substack

    Two new Showboat tools: Chartroom and datasette-showboat

42. 

    11 February 2026 · Substack

    Introducing Showboat and Rodney, so agents can demo what they’ve built

43. 

    7 February 2026 · Substack

    How StrongDM’s AI team build serious software without even looking at the code

44. 3 February 2026 · Monthly newsletter

    LLM digest: January 2026

45. 

    31 January 2026 · Substack

    Moltbook is the most interesting place on the internet right now

46. 

    29 January 2026 · Substack

    ChatGPT Containers can now run bash, pip/npm install packages, and download files

47. 

    23 January 2026 · Substack

    FastRender: a browser built by thousands of parallel agents

48. 

    13 January 2026 · Substack

    First impressions of Claude Cowork, Anthropic’s general agent

49. 

    9 January 2026 · Substack

    LLM predictions for 2026, shared with Oxide and Friends

50. 

    2 January 2026 · Substack

    2025: The year in LLMs

51. 2 January 2026 · Monthly newsletter

    LLM digest: December 2025