New release of LLM adds support for reasoning traces, OpenAI Responses, server-side tools, and smarter logging
Simon Willison's LLM CLI just got reasoning traces and server-side tools—the open-source Swiss Army knife for AI developers keeps one step ahead.
Why it matters
LLM, the popular open-source command-line tool for working with language models, ships major developer experience improvements (reasoning traces, response handling, server-side tools, logging) that make it easier for practitioners to debug, integrate, and ship AI features.
The key facts
10 to knowNew features: reasoning traces support, OpenAI Responses integration, server-side tools, smarter logging
LLM is a widely-used open-source CLI tool maintained by Simon Willison
Focus is developer experience and debugging, not model capability
Backward-compatible release maintaining existing workflows
LLM CLI tool adds reasoning trace support
OpenAI Responses integration
Server-side tools feature
Smarter logging capabilities
Release by Simon Willison (Datasette creator)
Open-source / indie developer tooling
Go to the source
Simon Willisonsimonwillison.net