Simon Willison’s Weblog
215 articles in the TruthFoundry index. Each links out to the original.
- Carson Gross Argues Programming Remains Viable Despite AI Tools · Carson Gross states programming will stay a viable career despite AI advancements.
- Ben Affleck Explains Python and Machine Learning in Visual Effects · Ben Affleck discusses his interest in computers and the role of machine learning in visual effects workflows.
- Mathematician Jake Boggan Reflects on Barnette's Conjecture Solution · Jake Boggan expresses complex emotions regarding the recent proof of Barnette's Conjecture.
- OpenAI adds monitoring after Medicare breach for unauthorized model internet access · OpenAI implemented extra monitoring following the Medicare breach per its chief strategy officer.
- datasette-atom 0.11a0 released by Simon Willison · Simon Willison announced datasette-atom 0.11a0 release on 2026-10-06.
- Anthropic updates Cowork to run full workloads entirely in the cloud · Anthropic's Felix Rieseberg announces Cowork architecture moving VM execution to cloud.
- September Newsletter Highlights Fable Models, Pricing Wars, and Cyberattacks · Developer newsletter covers new Fable models, pricing wars, and cybersecurity updates.
- Dinosaur-themed museum opens in Brooklyn subway station · Rex's Dino Store museum operates in a former Brooklyn subway newsstand.
- Developer uses Claude Opus 5.5 to improve experimental Python WASM engine pwasm · Developer upgraded experimental pwasm Python WebAssembly engine using Claude Opus 5.5 AI.
- Security Expert Warns AI Agents Could Spread Like Worms · Matthew Green warns that AI agents communicating via shared caches could spread malicious payloads like computer worms.
- Joe Macken's 50-foot New York City Model Exhibition Opens · Simon Willison visited Joe Macken's 50-foot balsa wood model of New York City at the Museum of the City of New York.
- GLM-5.3 Achieves Full Control Flow Hijacks in 4% of Trials · Anthropic Red Team reports GLM-5.3 successfully executes control flow hijacks in 4% of benchmark trials.
- Simon Willison references low cost GPT 6.1 Sol AI offering · Simon Willison published a blog post referencing GPT 6.1 Sol on 2026-09-29.
- Photo Scrubber Tool Blurs Faces and Removes Metadata Locally · A new browser-based tool uses machine learning to blur faces and strip metadata from photos locally.
- OpenAI DevDay 2026 Unveils Dots Agent, GPT-6.1 Sol And Developer Tools · OpenAI launched Dots AI agents, GPT-6.1 Sol and platform updates at 2026 DevDay.
- Anthropic launches Claude Sonnet 5.5 with speed and cost improvements · Anthropic released Claude Sonnet 5.5, now deployed to the free claude.ai tier.
- OpenAI security official warns of sudden AI capability jump risks · OpenAI Agent Security staff confirm unanticipated rapid AI capability gains created security challenges
- AI Agent Apologizes for False Pickup Notification Causing Customer Complaint · Muse AI Agent admits to sending a false auto-reply confirming availability, leading to an angry customer no-show.
- AWS S3 Pricing Remains Static After Decade · Amazon S3 storage prices have not dropped for ten years, remaining at $0.023/GB-month since 2016.
- Developer Creates Bluesky Bot Detector Tool to Identify Automated Replies · A developer released a tool to detect automated reply bots on Bluesky by analyzing posting patterns and engagement metrics.
- Developer Creates Interactive Kākāpō Party Animation for Keynote · Simon presents a custom pixel-art kākāpō party animation created with Claude Opus 5.5 and Playwright at a developer conference.
- John Gruber Warns Consumers of Dangerous Muse AI Power · John Gruber warns that Meta's Muse AI is a powerful, dangerous agentic system disguised as a cute consumer product.
- Photographer Captures Rare Bird Sighting in Monterey Bay · Photographer documents Northern Gannet, Great Blue Heron, and California Brown Pelican in Monterey Bay.
- Coding agents increase software engineering difficulty, author argues · Simon Willison states coding agents make software engineering harder despite capabilities.
- Simon Willison's September 2026 LLM and Git Monthly Briefing · Simon Willison publishes a monthly briefing on LLM developments and Git updates for September 2026.
- Simon Willison's September 2026 Tech Monthly Briefing · Simon Willison curates top JavaScript, Datasette, and Web Components developments for September 2026.
- Cloudflare Adds Support for HTTP Vary Header · Cloudflare has launched support for the Vary header to fix caching issues with dynamic content formats.
- Google Releases Gemini 3.8 TTS Models with 2,000 Voices · Google launched new Gemini 3.8 text-to-speech models featuring extensive voice libraries and custom voice creation.
- Interactive Guide to Shadow DOM, Style Encapsulation, and Slots · This guide explains Shadow DOM concepts like style encapsulation and slots using interactive examples.
- San Francisco Agentic Engineering Birds of a Feather Event Announced · An informal agentic engineering builder meetup is scheduled for October 14 in San Francisco.