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The llm-chat-completions-server plugin starts a localhost server on port 9001 that exposes all installed LLM models through a ChatGPT Completions compatible endpoint.

Installing and running the plugin starts a localhost server on port 9001 that makes all LLM models available via an OpenAI Chat Completions compatible API. ✦ AI generated

Author · Simon Willison's Weblog · 2026-07-30 · original ↗

To test that out, I built this plugin: uv tool install llm --pre llm install llm-chat-completions-server llm chat-completions-server -p 9001 Running this starts a localhost server on port 9001 that exposes your full collection of LLM models (from any plugins you have installed) using a ChatGPT Completions compatible endpoint.

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The llm-chat-completions-server plugin starts a localhost server on port 9001 that exposes all installed LLM models through a ChatGPT Completions compatible endpoint. — Atrium