LLM CLI (Simon Willison)

Overview

Simon Willison’s LLM CLI is a Python-based command-line tool that provides unified access to most major LLM providers directly from the terminal.[46][47][57] The recent 0.35 release added GPT-6 Astra support, so existing scripts and workflows can call the new model without integration changes. Developers should care because it offers a simple, scriptable interface for experimenting with models, building quick utilities, and wiring LLM calls into shell pipelines.