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LM Studio

LM Studio
closed / Overall score: 3.3

LM Studio is a desktop application for discovering, downloading and running large language models locally on macOS, Windows and Linux. It provides a chat interface, a Hugging Face model browser, an OpenAI-compatible local server, an MCP client, and llama.cpp and Apple MLX runtimes. The same core ships as llmster, a headless daemon for servers and continuous integration, alongside TypeScript and Python SDKs and the lms command-line tool. Element Labs builds it.

Openness

1 high confidence
1.0
license
Proprietary
source
closed
app
proprietary-freeware(ToS forbids modify/reverse-engineer/redistribute)
sdk+cli
MIT(public)
core-engine
closed

Core app/engine is closed proprietary freeware; only peripheral CLI/SDKs are open.

  • https://lmstudio.ai/app-terms recorded 2026-09-29

    Terms of use for the desktop app. Among the things the licensee may not do: "modify, adapt, alter, translate, or create derivative works from the Software" and "reverse engineer, decompile, disassemble, or otherwise attempt to derive the source code for the Software".

  • https://registry.npmjs.org/@lmstudio/sdk recorded 2026-09-29

    npm registry metadata for @lmstudio/sdk lists "license":"MIT" and the repository "git+https://github.com/lmstudio-ai/lmstudio-js.git".

Adoption

3 medium confidence
3.0

A widely-used consumer desktop app, but the vendor publishes no install or active-user count and no primary figure is obtainable, so the level is a conservative reading of that reported reach rather than a measured one.

Capability

4 medium confidence
4.0

LM Studio combines a desktop chat interface, a Hugging Face model browser, OpenAI- and Anthropic-compatible local endpoints, an MCP client and llama.cpp and Apple MLX runtimes. The llmster daemon runs the same core without the GUI, and the TypeScript and Python SDKs and the lms CLI cover scripting.

  • https://lmstudio.ai/ recorded 2026-09-29

    Home page: "Powered by the LM Studio runtime, with MLX and llama.cpp under the hood." Footer credit "Element Labs, Inc."

  • https://lmstudio.ai/docs/app recorded 2026-09-29

    Docs landing page listing what the app does: "Serve local models on OpenAI-like endpoints, locally and on the network" and "Connect MCP servers and use them with local models"; it is available for "macOS, Windows, and Linux".

  • https://lmstudio.ai/docs/developer recorded 2026-09-29

    Developer docs introduction: "TypeScript, Python, REST, and OpenAI and Anthropic-compatible endpoints", with sections for the TypeScript SDK, the Python SDK and the lms CLI.

  • https://lmstudio.ai/docs/developer/core/headless recorded 2026-09-29

    Headless guide: "is the core of the LM Studio desktop app, packaged to be server-native, without reliance on the GUI"; the desktop app can also run in headless mode.

Verified 2026-09-29, except some scores, still awaiting re-confirmation