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Jan vs ChatGPT: catalog facts
Jan	ChatGPT
Free Free and open source. Using a third-party cloud model through Jan costs whatever that…	Freemium Free to start; features and limits vary by plan.
Windows, macOS, Linux	Web
Runs fully offline on your own computer when you want it to Same interface for local models and for OpenAI, Anthropic, Google, Mistral and others	Handles writing, coding, analysis and images in one place Used from the browser with nothing to install
Still pre-1.0 and moving fast; features appear and change between releases Adding a cloud provider means putting that provider’s API key into the app	Features and limits vary by plan Hosted service, so prompts are processed on OpenAI's servers
Downloadable app	Web application
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Needs internet
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.