Simon Willison's Weblog
First-hand notes on AI and coding from a prolific engineer.
222 episodes indexed · ~88.8/month · since 2026-07 · Visit original ↗
datasette 0.65.5
2026-09-16 · 0 moments
datasette 1.0a40
2026-09-16 · 0 moments
Claude Cowork and chat are now one Claude
2026-09-16 · 0 moments
Quoting Mustafa Suleyman
2026-09-16 · 0 moments
Gemini Live audio
2026-09-15 · 0 moments
Quoting Laurie Voss
2026-09-14 · 0 moments
The contagion of fear
2026-09-14 · 0 moments
What blog posts influenced your thinking the most?
2026-09-14 · 0 moments
commit-rewriter 0.1
2026-09-14 · 0 moments
shot-scraper 1.12
2026-09-13 · 0 moments
OpenAI agents carried out an undisclosed attack on RubyGems
2026-09-12 · 0 moments
Quoting Paul Ford
2026-09-12 · 0 moments
California Brown Pelican
2026-09-12 · 0 moments
OpenAI agents attacked RubyGems back in May
2026-09-12 · 0 moments
Generating running routes with GPT-6 Astra and ChatGPT Work
2026-09-12 · 0 moments
Soft-deprecating re.match()
2026-09-11 · 0 moments
Datasette 1.0a39 and 0.65.4 security releases
2026-09-11 · 0 moments
Feeling sad about AI
2026-09-11 · 0 moments
So you want to use OpenRouter?
2026-09-11 · 0 moments
Don't sleep on wrapture
2026-09-11 · 0 moments
Quoting huggingface.co/security.txt
2026-09-11 · 0 moments
Native is now the future of mobile at Shopify
2026-09-10 · 0 moments
Quoting Calif Research
2026-09-10 · 0 moments
Any Nix package, live in your browser
2026-09-10 · 0 moments
.blend URL Viewer
2026-09-09 · 0 moments
Quoting Terence Tao
2026-09-09 · 0 moments
Introducing ChatGPT Images 2.5
2026-09-08 · 0 moments
On the Navier–Stokes Millennium Prize Problem
2026-09-08 · 0 moments
Some thoughts on the Navier–Stokes Millennium Prize Problem
2026-09-08 · 0 moments
Quoting Jakub Pachocki
2026-09-07 · 0 moments
Video compressor
2026-09-07 · 0 moments
llm 0.35
2026-09-07 · 0 moments
Mercator ↔ Equal Earth
2026-09-07 · 0 moments
Creepy crawlies
2026-09-07 · 0 moments
Quoting Zach Kehs
2026-09-06 · 0 moments
There's No Limit to How Bad Code Can Get
2026-09-06 · 0 moments
Research acceleration: The view inside OpenAI
2026-09-06 · 0 moments
The purpose of DNS is to spread scams
2026-09-06 · 0 moments
Using Blender with coding agents on macOS
2026-09-05 · 0 moments
Introducing GPT-6 Astra for developers
2026-09-05 · 0 moments
OpenAI's rogue agents were caught communicating via public wikis
2026-09-04 · 0 moments
The Pelican comparison grid for Astra is pretty interesting
2026-09-04 · 0 moments
August newsletter is out
2026-09-04 · 0 moments
GPT‑6 Astra
2026-09-03 · 0 moments
Quoting Rick Brewster
2026-09-02 · 0 moments
llm-gemini 0.34
2026-09-02 · 0 moments
Claude's new system prompt really doesn't want to reproduce song lyrics
2026-09-02 · 0 moments
datasette-mcp 0.2
2026-09-01 · 0 moments
Codex bundles LibreOffice
2026-09-01 · 0 moments
Python 3.15.0 candidate 2 is here!
2026-09-01 · 0 moments
GeoJSON Map Viewer
2026-09-01 · 0 moments
Quoting Tarn Adams
2026-09-01 · 0 moments
Claude Fable 5.1 made me a really nice animated pelican
2026-09-01 · 0 moments
Quoting Andrew Digby
2026-08-31 · 0 moments
Introducing wrapture
2026-08-31 · 0 moments
Understanding ChatGPT Work
2026-08-30 · 0 moments
Introducing Hy4 Preview
2026-08-29 · 0 moments
Just a rumour of a bug is enough to find a security exploit these days
2026-08-28 · 0 moments
Breaking Claude Code Opus 5 Auto Mode
2026-08-27 · 0 moments
Qwen3.8-Flash-Next
2026-08-26 · 0 moments
Quoting Paul Dix
2026-08-26 · 0 moments
EVE Online: The Move to Python 3 Begins!
2026-08-25 · 0 moments
Your executable is a SQLite database
2026-08-24 · 0 moments
llm-anthropic 0.27
2026-08-24 · 0 moments
Anthropic’s best AI model struggles to attract users as cheaper tools thrive
2026-08-23 · 0 moments
Quoting Drew Breunig
2026-08-23 · 0 moments
More than just code review
2026-08-22 · 0 moments
llm 0.33
2026-08-22 · 0 moments
llm 0.32.1
2026-08-21 · 0 moments
Stop Making TUIs
2026-08-21 · 0 moments
llm-openrouter 0.7
2026-08-21 · 0 moments
Quoting Matt Webb
2026-08-21 · 0 moments
A shot-scraper-style JSON API on Bun 1.4's new Bun.WebView
2026-08-20 · 0 moments
ChatGPT search now uses the site:operator at scale
2026-08-20 · 0 moments
Quoting Jeremy Morrell
2026-08-19 · 1 moments
smolmachines / smolvm as a sandbox for untrusted Python & JavaScript
2026-08-19 · 3 moments
Conceptual integrity and counting lines of code
2026-08-19 · 6 moments
Mojo🔥 is now open source
2026-08-18 · 4 moments
Qwen 3.8 27B scores 52 on the Artificial Analysis Intelligence Index
2026-08-17 · 0 moments
We Tracked a Shipment of Rare Books. It Ended at an Amazon AI Training Facility
2026-08-17 · 4 moments
Markdown SVG upgrades
2026-08-16 · 6 moments
Qwen 3.8 27B is excellent, but it defaults to wildly overthinking things
2026-08-16 · 6 moments
Quoting Dario Amodei
2026-08-16 · 3 moments
Northern Gannet
2026-08-15 · 2 moments
CORS Chat
2026-08-15 · 5 moments
Don't classify. Hallucinate!
2026-08-14 · 4 moments
alchemy-utils 0.1a1
2026-08-13 · 0 moments
sqlite-utils 4.2.1
2026-08-13 · 2 moments
sqlite-utils 4.2
2026-08-13 · 4 moments
llm-gemini 0.33
2026-08-13 · 4 moments
Quoting Florian Herrengt
2026-08-12 · 2 moments
alchemy-utils 0.1a0
2026-08-12 · 3 moments
DeepSeek V4 Pro 0813 (on OpenRouter)
2026-08-12 · 4 moments
There are no lossless transformations of natural-language text
2026-08-11 · 2 moments
datasette-upload-dbs 0.5a0
2026-08-11 · 4 moments
Stealing Reasoning Traces from Proprietary LLM APIs
2026-08-11 · 5 moments
Quoting OpenClaw (running Opus 4.6)
2026-08-10 · 0 moments
Quoting OpenClaw
2026-08-10 · 0 moments
Introducing Muse Glimmer
2026-08-10 · 5 moments
SQLite compressed text-history prototypes
2026-08-09 · 5 moments
Quoting Claude Opus 5 system prompt
2026-08-09 · 3 moments
GitHub Models is now retired
2026-08-09 · 4 moments
Auto mode is now the default in Claude Code for Pro, Max, and Team plans
2026-08-08 · 6 moments
Quoting John Gruber
2026-08-08 · 2 moments
The Tokenpocalypse Is Here: Companies Are Scrambling To Stop Spending So Much on AI
2026-08-07 · 3 moments
Now we have a timeline of the OpenAI accidental attack against Hugging Face
2026-08-07 · 5 moments
Moonlight & Mayhem (Raccoon Heist by Codex + GPT-5.6 Sol Ultra)
2026-08-07 · 5 moments
An AI model from Meta also hacked another company during testing
2026-08-06 · 3 moments
Simon Willison on Technical Blogging
2026-08-06 · 2 moments
datasette 0.65.3
2026-08-06 · 0 moments
datasette 1.0a38
2026-08-06 · 5 moments
Third-party cyber evaluations involving OpenAI models
2026-08-05 · 3 moments
Incident Report: unsanctioned agent behaviour during cyber testing
2026-08-05 · 3 moments
One-shotting a Raccoon Heist game using Claude Fable 5
2026-08-05 · 6 moments
Introducing Muse Code and Muse Spark 1.2
2026-08-05 · 5 moments
New release of LLM adds support for reasoning traces, OpenAI Responses, server-side tools, and smarter logging
2026-08-04 · 6 moments
llm 0.32
2026-08-04 · 0 moments
Quoting Steve Yegge
2026-08-04 · 5 moments
PipeNetwork/minimax-h3-mlx
2026-08-04 · 5 moments
llm-anthropic 0.26
2026-08-04 · 4 moments
Quoting David Crawshaw's prompt
2026-08-03 · 0 moments
Quoting David Crawshaw
2026-08-03 · 0 moments
Don't be a meat proxy
2026-08-03 · 2 moments
Devtools must be open source (exe.dev)
2026-08-03 · 6 moments
condense-json 1.0
2026-08-02 · 4 moments
Open letters about AI development
2026-08-02 · 6 moments
July 2026 newsletter
2026-08-02 · 3 moments
Quoting Greg Brockman
2026-08-01 · 2 moments
datasette-apps 0.2a0
2026-08-01 · 4 moments
Ten advances in mathematics and theoretical computer science
2026-08-01 · 6 moments
datasette-agent 0.4a0
2026-07-31 · 0 moments
Stateless MCP has recaptured my interest (and inspired mcp-explorer and datasette-mcp)
2026-07-31 · 6 moments
deepseek-ai/DeepSeek-V4-Flash-0731
2026-07-31 · 4 moments
smevals - a small eval suite for evaluating models, prompts, and harnesses
2026-07-31 · 4 moments
llm-mcp-client 0.1a0
2026-07-31 · 0 moments
Oxide and Friends: The Open Weight Revolution with Simon Willison
2026-07-31 · 5 moments
Investigating three real-world incidents in our cybersecurity evaluations
2026-07-30 · 6 moments
Advancing the price-performance frontier with GPT‑5.6
2026-07-30 · 4 moments
llm 0.32rc2
2026-07-30 · 4 moments
llm-chat-completions-server 0.1a0
2026-07-30 · 4 moments
llm 0.32rc1
2026-07-30 · 4 moments
Quoting Bruce Schneier
2026-07-30 · 1 moments
Quoting Matthew Green
2026-07-29 · 3 moments
AI Worming through Word
2026-07-29 · 5 moments
Adding a custom MCP server to Claude and ChatGPT
2026-07-29 · 0 moments
Quoting D. Richard Hipp
2026-07-29 · 3 moments
uv 0.12.0
2026-07-28 · 4 moments
Quoting Akshat Bubna
2026-07-28 · 0 moments
Discovering cryptographic weaknesses with Claude
2026-07-28 · 4 moments
Anatomy of a Frontier Lab Agent Intrusion: A Technical Timeline of the July 2026 Incident
2026-07-28 · 6 moments
An opinionated guide to which AI to use to do stuff
2026-07-27 · 8 moments
moonshotai/Kimi-K3
2026-07-27 · 5 moments
An Inside Look at the Relay Market Powering Token Resellers and Fraud
2026-07-26 · 6 moments
Ruff v0.16.0
2026-07-25 · 7 moments
Quoting Boris Cherny
2026-07-25 · 0 moments
Introducing Claude Opus 5
2026-07-24 · 3 moments
The first known runaway AI agent - or a very bad marketing stunt?
2026-07-23 · 2 moments
Quoting Seth Larson
2026-07-23 · 3 moments
OpenAI’s accidental cyberattack against Hugging Face is science fiction that happened
2026-07-22 · 6 moments
Quoting Thomas Ptacek
2026-07-22 · 0 moments
Orchestrions
2026-07-22 · 0 moments
Are AI labs pelicanmaxxing?
2026-07-22 · 4 moments
California Sea Lion
2026-07-21 · 0 moments
Nativ: Run AI models locally on your Mac
2026-07-21 · 3 moments
A Fireside Chat with Cat and Thariq from the Claude Code team
2026-07-21 · 6 moments
Who’s Afraid of Chinese Models?
2026-07-20 · 4 moments
Quoting Sam Altman
2026-07-20 · 1 moments
Reverse-engineering is cheap now
2026-07-20 · 3 moments
Claude Code uses Bun written in Rust now
2026-07-19 · 4 moments
AI Mania Is Eviscerating Global Decision-Making
2026-07-19 · 4 moments
Claude make Fable 5 permanent
2026-07-18 · 6 moments
SQLite Query Explainer
2026-07-18 · 4 moments
nascheme/quixote
2026-07-18 · 0 moments
Spot birds not golf
2026-07-17 · 4 moments
Quoting Kimi K3
2026-07-17 · 0 moments
LLM cliché highlighter
2026-07-17 · 0 moments
Inkling: Our open-weights model
2026-07-16 · 6 moments
Mermaid to Unicode box art (grok-mermaid)
2026-07-16 · 0 moments
Quoting Linus Torvalds
2026-07-16 · 4 moments
Kimi K3, and what we can still learn from the pelican benchmark
2026-07-16 · 6 moments
Mermaid to ASCII art (mermaid-ascii)
2026-07-16 · 0 moments
Quoting Thibault Sottiaux
2026-07-16 · 3 moments
Firefox in WebAssembly
2026-07-16 · 6 moments
How I tricked Claude into leaking your deepest, darkest secrets
2026-07-15 · 6 moments
xai-org/grok-build, now open source
2026-07-15 · 6 moments
Using uvx in GitHub Actions in a cache-friendly way
2026-07-14 · 3 moments
Quoting Armin Ronacher
2026-07-14 · 4 moments
Quoting GitHub Changelog
2026-07-14 · 0 moments
Quoting GitHub Changeling
2026-07-14 · 0 moments
datasette 1.0a37
2026-07-14 · 0 moments
lobste.rs is now running on SQLite
2026-07-14 · 6 moments
simonw/pedalican
2026-07-14 · 6 moments
datasette code-frequency chart on GitHub
2026-07-13 · 2 moments
DOOMQL
2026-07-13 · 6 moments
shot-scraper 1.11
2026-07-12 · 4 moments
Fable gets another bump
2026-07-12 · 6 moments
Directly Responsible Individuals (DRI)
2026-07-12 · 3 moments
sqlite-utils 4.1.1
2026-07-12 · 3 moments
sqlite-utils 4.1
2026-07-11 · 6 moments
Quoting Nilay Patel
2026-07-10 · 5 moments
Quoting OpenAI
2026-07-10 · 0 moments
llm-meta-ai 0.1
2026-07-09 · 0 moments
Introducing Muse Spark 1.1
2026-07-09 · 4 moments
The new GPT-5.6 family: Luna, Terra, Sol
2026-07-09 · 6 moments
llm 0.31.1
2026-07-09 · 0 moments
Quoting Kenton Varda
2026-07-08 · 0 moments
Introducing GPT‑Live
2026-07-08 · 6 moments
Rewriting Bun in Rust
2026-07-08 · 6 moments
sqlite-utils 4.0
2026-07-07 · 0 moments
github-code Web Component
2026-07-07 · 4 moments
sqlite-utils 4.0, now with database schema migrations
2026-07-07 · 6 moments
sqlite-migrate 0.2
2026-07-07 · 0 moments
sqlite-utils 4.0rc4
2026-07-07 · 0 moments
sqlite-utils 4.0rc3
2026-07-06 · 3 moments
tencent/Hy3
2026-07-06 · 6 moments
sqlite-utils 4.0rc2
2026-07-05 · 0 moments
sqlite-utils 4.0rc2, mostly written by Claude Fable (for about $149.25)
2026-07-05 · 6 moments
Better Models: Worse Tools
2026-07-04 · 5 moments
Building a World Map with only 500 bytes
2026-07-04 · 2 moments
Fable's judgement
2026-07-03 · 6 moments
Quoting Josh W. Comeau
2026-07-03 · 4 moments
Open Source AI Gap Map
2026-07-03 · 5 moments