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Simon Willison’s Newsletter

Simon Willison

AI, LLMs, web engineering, open source, data science, Datasette, SQLite, Python and more

Platform
Substack
PricingOnly free issuesPublishesWeekly
Issues172Founded4 years agoLast Issue10 days ago
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Latest Issues

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

In this newsletter:

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

  • Live blog: Code w/ Claude 2026

  • Notes on the xAI/Anthropic data center deal

Plus 4 links and 3 quotations and 9 beats


Sponsor...

10 days ago
77
8

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

In this newsletter:

  • DeepSeek V4 - almost on the frontier, a fraction of the price

  • Tracking the history of the now-deceased OpenAI Microsoft AGI clause

  • LLM 0.32a0 is a major backwards-compatible refactor

Plus 9 links and 4...

17 days ago
56
1

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

In this newsletter:

  • A pelican for GPT-5.5 via the semi-official Codex backdoor API

  • Where’s the raccoon with the ham radio? (ChatGPT Images 2.0)

  • Is Claude Code going to cost $100/month? Probably not - it’s all very confusing...

24 days ago
72
5

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

In this newsletter:

  • Join us at PyCon US 2026 in Long Beach - we have new AI and security tracks this year

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

Plus 6 links and 3 quotations and 4 notes and...

a month ago
73

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

In this newsletter:

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

  • Anthropic’s Project Glasswing - restricting Claude Mythos to security researchers - sounds necessary to me

  • The Axios supply chain...

a month ago
69
6

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#79

Authors

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  • Simon Willison

    Creator of @datasetteproj, co-creator Django. Fellow at @JSKstanford. Collector of @nichemuseums. Usually hanging out with @natbat and @cleopaws. He/Him

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