Simon Willison's Weblog AI news

Simon Willison's WeblogNewsletter

Gemini Decisions API

Gemini Decisions API Google join Jev and OpenAI in the decision model category with "Gemini Decision 1". This new model API is almost identical to Jev: it supports the same three types of questions (yes/no, choice, and rubric-scoring) and…

Agents and toolsModels

Simon Willison's WeblogNewsletter

llm 0.37.2

Release: llm 0.37.2 Fixes a security issue reported by Daniel de Araujo in GHSA-v9h7-jj4g-f862 and GHSA-r639-rr7r-x72w . LLM has a mechanism called extra-openai-models.yaml - now managed by the new-in-0.37 llm openai endpoint add command…

Simon Willison's WeblogNewsletter

Anthropic's IPO roadshow video

Anthropic's IPO roadshow video Anthropic kicked off their IPO roadshow yesterday, and their roadshow video has some previously unreleased information about how their business works. The section on "Approach to compute" with co-founder Tom…

Business

Simon Willison's WeblogNewsletter

llm-gemini 0.36

Release: llm-gemini 0.36 Gemini 4 Carbon was announced two weeks ago for "a subset of cyber defenders", but today it's available to everyone else . This is Google's best ever Gemini, priced at $2/million input and $10/million output at…

Models

Simon Willison's WeblogNewsletter

Introducing Our Smallest, Most Efficient Model: Muse Ember

Introducing Our Smallest, Most Efficient Model: Muse Ember Meta AI just launched their entry in the Claude Haiku/GPT Luna category: Muse Ember, which they describe as: [...] our smallest and most efficient model designed for complex…

Models

Simon Willison's WeblogNewsletter

Quoting Prompting Claude Fable 5.2

Claude Fable 5.2 responds closely to what the prompt says about who owns the code it works on. In Anthropic’s testing on small coding tasks, when a prompt said nothing about ownership or presented the code base as someone else’s, the model…

Models

Simon Willison's WeblogNewsletter

Yonkers Rises

Tool: Yonkers Rises I realized I didn't know where Yonkers was, so I looked it up on Google Maps and then, to help embed its location and shape in my head (and to try out Claude Fable 5.2's 3D modeling and animation skills), I prompted…

Simon Willison's WeblogNewsletter

llm-anthropic 0.31

Release: llm-anthropic 0.31 Anthropic released Fable 5.2 and Mythos 5.2 today. Fable 5.2 is currently ranked first on Artificial Analysis . Anthropic say it "solved two open problems in the physics of black holes", so clearly their…

Simon Willison's WeblogNewsletter

Locating the source of a mysterious beep with Claude

Our house has a box room, full of boxes that we still haven't unpacked from our last move. A couple of weeks ago something in that room started intermittently beeping . The beeps were far enough apart that standing in the room and trying…

Models

Simon Willison's WeblogNewsletter

Hide your slop PR descriptions behind

Most of the changes I make to my projects these days come in the form of PRs opened for me by Claude Code or Codex. The PR is my unit of work - I use them to bundle commits together, iterating on them until a feature is complete, document…

Simon Willison's WeblogNewsletter

Quoting Nilay Patel

The products aren't good enough to sell people on the costs. You cannot tell people that you have to listen to the whine of a data center in their backyard for AI overviews and some of the most hilarious deep fake slop in history. It's not…

Simon Willison's WeblogNewsletter

datasette-llm 0.1a10

Release: datasette-llm 0.1a10 Fixes a bug that affected my agent.datasette.io demo site, where the set of available LLM models was not correctly restricted to just those in the configuration. Tags: llm , datasette

Simon Willison's WeblogNewsletter

datasette-apps 0.3a0

Release: datasette-apps 0.3a0 Datasette Apps adds support for hosting and editing custom HTML applications inside of Datasette. These can be created by hand, but it's easier to create them using LLMs via Datasette Agent . This release…

Simon Willison's WeblogNewsletter

llm 0.37.1

Release: llm 0.37.1 A bugfix release for LLM , with contributions from Steven Huang , Tao An , Arjan Mossel , and XQ . Tags: llm

Simon Willison's WeblogNewsletter

AI is destroying my CS degree

My comment on AI is destroying my CS degree — Hacker News. I don't envy educators right now. AI clearly means you need to change how you teach and evaluate students. We are only a few years in though, and it's still extremely unclear what…

Simon Willison's WeblogNewsletter

Qwen 3.8 27B on my laptop can interpret model weights, too

Yesterday's hot paper was Sparks of Weight-Space Programming: LLMs can natively read & write neural network weights by Rikiya Takehi, Jayden Teoh, Alex Zhang, and Omar Khattab. The paper (OK, the authors classify is as a "blog post", but…

ModelsResearch

Simon Willison's WeblogNewsletter

llm 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. I added gpt-6.1-sol and gpt-6.1-terra , plus a new llm openai endpoint…

Simon Willison's WeblogNewsletter

The 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. corporate AI adoption based on numbers collected by the…

Simon Willison's WeblogNewsletter

Quoting Kyle Kingsbury

More broadly, the use of LLMs erodes trust in documentation, in software, and in the organizations which produce them. Perhaps engineers will begin to treat any new software project with suspicion—the signals we used to rely on as markers…

Simon Willison's WeblogNewsletter

How 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 latest revision is called HTML previews )…

Simon Willison's WeblogNewsletter

datasette-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. It now picks up the default model used by LLM…