Buy LocalLM Lab - ThisBrainAI a coffee

LocalLM Lab is a free Mac developer tool from ThisBrain AI for the AI models that run on Apple Silicon. LocalLM Lab is a free Mac developer tool from ThisBrain AI for the AI models that run on Apple Silicon. Use the Prompt Playground to experiment directly with Apple's built-in on-device model, with Claude, or with open-weight models you download from Hugging Face and run locally — Qwen, DeepSeek, Llama, Gemma, Phi, and others, via MLX. Build against any of them through one OpenAI-compatible local API, or link the Swift SDK — the first MCP client built for on-device models on the Mac — into your own app. The 1.0 beta ships eight runnable example apps to start from, from a coding agent to a sandboxed, Mac App Store–shaped GUI.

No account, no paid tier, no funding. If it saved you time or taught you something, a coffee helps cover the Apple Developer Program, test hardware for new Apple Silicon, the model testing behind the open-weight field reports, and the hours of keeping it working as macOS, the models, and the Mac hardware change.