Simon Willison’s Weblog
I built this new plugin for LLM to add support for TypeSafe AI's new Jev model . Install it like this:
llm install llm-typesafe
Then set an API key ( get one here , the waitlist seems to move pretty fast):
llm keys set typesafe # Paste key
And now you can ask yes/no "noul" questions like this:
llm -m jev 'Please refund my last payment.' \ -s 'Does this message explicitly request a refund?'
{"type": "noul", "noul": 0.99}
cat message.txt | llm -m jev \ -s ' Which team should handle this message? If billing and technical issues both occur, choose billing. ' \ -o answer_type choice \ -o criteria ' { "billing":"Charges, invoices, payments, or refunds", "technical":"Problems installing or using the product", "other":"Neither category fits" } '
cat report.txt | llm -m jev \ -s ' How reproducible is the problem described in this report? ' \ -o answer_type score \ -o criteria ' [ "No reproduction instructions", "Some instructions, but important steps are missing", "Complete steps with expected and actual results" ] '
Recent articles
Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war - 22nd September 2026
Jev introduces a new shape of LLM - System One, aka Decision Models - 21st September 2026
Generating running routes with GPT-6 Astra and ChatGPT Work - 12th September 2026
This is a beat by Simon Willison, posted on 22nd September 2026 .
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