Simon Willison

Software developer and co-creator of the Django web framework. His prolific blog covers LLMs, developer tools, and open data with a focus on building practical applications, and his open-source tools Datasette and llm have become standard infrastructure for data exploration and AI experimentation.

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Recent Articles

Be alert: targeted attacks on prominent Rustaceans
Simon Willison · Tech · 3d ago
Self-generated prompt injections in compaction summaries
Simon Willison · Tech · 3d ago
OpenAI agents attacked RubyGems back in May
Simon Willison · Tech · 9d ago
Any Nix package, live in your browser
Simon Willison · Tech · 10d ago
Claude's new system prompt really doesn't want to reproduce song lyrics
Simon Willison · Tech · 18d ago
Introducing Hy4 Preview
Simon Willison · Tech · 22d ago
Just a rumour of a bug is enough to find a security exploit these days
Simon Willison · Tech · 23d ago
Breaking Claude Code Opus 5 Auto Mode
Simon Willison · Tech · 24d ago
EVE Online: The Move to Python 3 Begins!
Simon Willison · Tech · 26d ago
Mojo🔥 is now open source
Simon Willison · Tech · 1mo ago
Qwen 3.8 27B scores 52 on the Artificial Analysis Intelligence Index
Simon Willison · Tech · 1mo ago
We Tracked a Shipment of Rare Books. It Ended at an Amazon AI Training Facility
Simon Willison · Tech · 1mo ago
Qwen 3.8 27B is excellent, but it defaults to wildly overthinking things
Simon Willison · Tech · 1mo ago
Stealing Reasoning Traces from Proprietary LLM APIs
Simon Willison · Tech · 1mo ago
The Tokenpocalypse Is Here: Companies Are Scrambling To Stop Spending So Much on AI
Simon Willison · Tech · 1mo ago
Now we have a timeline of the OpenAI accidental attack against Hugging Face
Simon Willison · Tech · 1mo ago
Incident Report: unsanctioned agent behaviour during cyber testing
Simon Willison · Tech · 1mo ago
An AI model from Meta also hacked another company during testing
Simon Willison · Tech · 1mo ago
Our evaluation of OpenAI's GPT-5.5 cyber capabilities
Simon Willison · AI · 4mo ago
LLM 0.32a0 is a major backwards-compatible refactor
Simon Willison · AI · 4mo ago