Simon Willison’s Weblog

31st March 2026

Release llm-echo 0.3 — Debug plugin for LLM providing an echo model

Mechanisms for testing tool calls. #3

Mechanism for testing raw responses. #4

New echo-needs-key model for testing model key logic. #7

Posted 31st March 2026 at 3:43 pm

Recent articles

Datasette Apps: Host custom HTML applications inside Datasette - 18th June 2026
GLM-5.2 is probably the most powerful text-only open weights LLM - 17th June 2026
Publishing WASM wheels to PyPI for use with Pyodide - 13th June 2026

This is a beat by Simon Willison, posted on 31st March 2026.

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe