PyGPT

Open-source desktop AI assistant that wires every major LLM provider into one local app with agents, vision, and a code interpreter.

Free· Free and open-source (MIT); bring your own provider API keysWritingMulti-model (GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Ollama)

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Best for

Pick PyGPT if you want one open-source desktop cockpit that talks to every major LLM provider plus local Ollama models.

Skip if

Skip it if you need a managed cloud service, a programmable API, or a polished consumer chat app with zero setup.

PyGPT is a cross-platform desktop AI assistant for Windows, macOS, and Linux that serves as a self-hosted alternative to ChatGPT's web app. It bundles 12 operational modes including chat, vision, image and video generation, an autonomous agent runner, and a built-in Python code interpreter, with LlamaIndex baked in so you can point it at local files and chat with your own data.

What makes it distinct is that it is genuinely model-agnostic and genuinely free. The app is MIT-licensed and you bring your own API keys, slotting in OpenAI GPT-5/GPT-4/o-series, Anthropic Claude, Google Gemini, xAI Grok, DeepSeek, Perplexity, Mistral, or anything you run locally through Ollama. That makes it a good fit for tinkerers, privacy-minded power users, and developers who want one keyboard-driven cockpit instead of juggling six different web UIs.

The plugin system covers web search, file management, voice I/O, a task scheduler, and custom integrations, and token usage is surfaced in real time so you can keep an eye on what each provider is costing you. PyGPT itself does not expose an API — it is a client, not a server — so teams that need programmatic access should look elsewhere.

Editor's take

PyGPT is the kind of project the open-source desktop AI space needs more of: a single MIT-licensed client that does not lock you to one vendor. It is opinionated about being a power-user tool, so expect to spend an evening configuring keys and plugins — but the payoff is a genuinely capable local assistant.

— The AI Tool Bible editorial team

Pros

✅ Truly multi-provider: OpenAI, Anthropic, Google, xAI, DeepSeek, Mistral, Ollama in one app
✅ MIT-licensed and free; you only pay the underlying API providers
✅ Bundles agents, vision, image/video gen, and a Python code interpreter
✅ LlamaIndex integration for chatting with local files and folders
✅ Cross-platform desktop builds for Windows, macOS, and Linux