Any model
Claude Code, ChatGPT or your own keys.
Stella is a personal AI assistant that can run on the models you already pay for. Use Claude Code as its engine, sign in with ChatGPT to use your plan, add API keys for Anthropic, OpenAI, Google, xAI, OpenRouter and more, or run local models. Or use Stella’s own models with no setup. Free.
No setup by default
Stella’s own models work the moment you open the app.
Your subscription
Run Stella on Claude Code, or sign in with ChatGPT to use your plan.
Your keys, your machine
Anthropic, OpenAI, Google, xAI, Moonshot, Z.AI, OpenRouter, GitHub Copilot or a local model.
Questions.
Can I use Claude Code, ChatGPT or my own API keys with Stella?
Yes. Stella works out of the box on its own models. You can also run it on Claude Code, sign in with ChatGPT to use your plan, or add keys for Anthropic, OpenAI, Google, xAI, Moonshot, Z.AI, OpenRouter, GitHub Copilot and more. Local models work too.
What is a free, open-source alternative to the ChatGPT and Claude desktop apps?
Stella. It is open source under Apache 2.0, the Free plan costs nothing, and it can act across your whole computer. It also runs on the same models: sign in with your ChatGPT plan, use Claude Code, or add your own Anthropic or OpenAI key.
Is Stella free?
Yes. The Free plan is $0, with no credit card and no trial. Go is $5 a month for 10× more usage. Pro is $15 a month for the highest limits, image, video, 3D and voice generation, and multiple agents working at once.