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Simon Willison

24 stories

Simon WillisonVoicesI discovered a sound that leaks your exact location (and it's everywhere) - YouTube I discovered a sound that leaks your exact location (and it's everywhere) - YouTube Genius piece of OSINT by Colsto, who demonstrates how you can take almost imperceptible background noise of…

Simon WillisonVoicesOctober sponsors-only newsletter I sent out the October edition of my sponsors-only monthly newsletter . If you are a sponsor (or start a sponsorship now) you can access it here .

Simon WillisonVoicesllm 0.37 Release: llm 0.37 There's a lot of stuff in this new release of my LLM CLI tool and Python library, representing around two months of accumulated features and fixes.

Simon WillisonVoicesThe U.S. Census Bureau and “Super Intelligence” I was reminded today of AI Adoption Rate Trending Down for Large Companies , a chart produced by Apollo Global Management in September 2025, which appeared to show a slowdown in U.S.

Simon WillisonVoicesIf in doubt, delete the uv.lock file I've been getting the occasional confusing Python dependency error since switching over to Python 3.15 and the rule I'm having to remember is: If in doubt, delete the uv.lock file Most of my projects…

Simon WillisonVoicesQuoting Kyle Kingsbury More broadly, the use of LLMs erodes trust in documentation, in software, and in the organizations which produce them.

Simon WillisonVoicesHow We Took Over ChatGPT Accounts How We Took Over ChatGPT Accounts Parameter Labs describe an exploit they found against ChatGPT's implementation of the artifacts pattern (OpenAI used to call this "Canvas" but it looks like the…

Simon WillisonVoicesdatasette-llm 0.1a9 Release: datasette-llm 0.1a9 I have some big upgrades to Datasette Agent in the pipeline, but in the meantime here's a tiny user experience improvement to the underlying datasette-llm plugin.

Simon WillisonVoicesdbreunig/nesformer dbreunig/nesformer Inspired by qwenputer by Divyansh Agrawal, Drew Breunig baked a working emulator for a Nintendo Entertainment System 6502 CPU into the weights of Qwen3.5-4B.

Simon WillisonVoicesAPI credits benefit for eligible ChatGPT subscriptions API credits benefit for eligible ChatGPT subscriptions Earlier this month Anthropic announced a generous new benefit for their Max and Team subscriptions: $100, $200, and $500 per month subscribers…

Simon WillisonVoicesBuilding a multiplayer game world with autonomous Fable-class models How I Built the Most AI-Pilled Company in the World Don't be put off by the clickbait headline, this piece by Jacob Sansbury describing how they are building Spawn is a fascinating exploration of the…

Simon WillisonVoicesQuoting Ben Hylak every product i use should just be a headless mcp, that feeds into an agent, where i never have to think about anything underneath. except for our product, of course.

Simon WillisonVoicesQuoting Ted Sanders In general, LLM performance is incredibly multidimensional. There's no guarantee of a fixed ordering where the model that is best at math is also the model that's best at jokes.

Simon WillisonVoicesGitHub Octoverse 2026 GitHub Octoverse 2026 I'm at GitHub Universe today (GitHub gave me a free ticket through their "GitHub Stars" program).

Simon WillisonVoicesThe October inflection point for vibe game development I've written before about how November 2025 was an inflection point for coding agents - the point where Opus 4.5 and GPT-5.1 crossed a tipping point that meant their respective coding agents became…

Simon WillisonVoicesQuoting Terk Terkowitz If your work does not benefit from current AI tooling, that is a finding, not a failing. Document why, share it with your community of peers, bring it to your manager, and work to find solutions.

Simon WillisonVoicesGame Boy Color on My Conference Badge Game Boy Color on My Conference Badge I'm at GitHub Universe this week and, similar to last year , the conference badge is a full-blown color screen computer.

Simon WillisonVoicesGPT-6.1 Terra GPT-6.1 Terra It's always interesting to note which aspects of a new model are emphasized in the release announcement.

Simon WillisonVoicesQuoting Jason Koebler Because big tech platforms essentially do not have customer support and make it impossible for their users to contact a human, many people experiencing run-of-the-mill tech problems have turned to…

Simon WillisonVoiceswebframe: evaluated as a scraper and a sandbox Research: webframe: evaluated as a scraper and a sandbox webframe is a neat little project from Jeff Lindsay which lets you "run a web page like a program" - you point it at a URL or file and it…

Simon WillisonVoicesSeam Cutter Tool: Seam Cutter I built this weird and very specific cropping tool - it lets you create a horizontal or vertical cut across an image, then slide the two sides relative to each other.

Simon WillisonVoicesbattledrones v14: Compass Rose, a four player map Release: battledrones v14: Compass Rose, a four player map I added four player online mode to Battledrones - previous maps were limited to two.

Simon WillisonVoicesQuick Study Tool: Quick Study Prompt to Claude Opus 5.5 High : Build an artifact where you open a photo and it rapidly (in a few seconds) paints a version of that photo using a canvas element and simulated…

Simon WillisonVoicesIntroducing Kimi K3.1 Pro Introducing Kimi K3.1 Pro Kimi K3.1 Pro landed on the Kimi API today - it's not yet open weights, but Moonshot promise "Full model weights will be released by Nov 4, 2026".

On the calendar

予定 · Conferences and launch events, this week's stories from each corner of the industry, and what its press is covering — in English

On view

This week, from that corner the newest stories from the corner of the industry you picked

The wire their own posts, translated

How code moves in 2026 from the industry's own reports

Sources

Fetched every six hours, linked to the original

About

The name is the button.

An agent writes the code now, and a human thumb hovers over Accept all a hundred times a day. The honest question of this decade is what, exactly, you just accepted. So I read the diff.

Eight years as a backend engineer in Stockholm, back in Tokyo since 2023, and I still ship something small most nights, usually badly. My one rule: the only real review of a model is the thing you built with it. That is why there is no leaderboard on this site.

Around a hundred and forty sources come through — the labs' own posts, the papers, the tools, the runtimes and languages nobody is watching yet, the chip under the demo, and the newsletters people actually forward. What is moving gets counted so the week reads at a glance, and every few days I explain one mechanism in plain words.

A story here is a headline, a short excerpt, one image and the link to whoever wrote it. We never reproduce the post; the images belong to their authors. A post written in Japanese appears in Japanese, exactly as it was published, and the link goes to the original.

— Yuki Halvorsen, Tokyo