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ChatGPT vs Jan: catalog facts
ChatGPT	Jan
Freemium Free to start; features and limits vary by plan.	Free Free and open source. Using a third-party cloud model through Jan costs whatever that…
Web	Windows, macOS, Linux
Handles writing, coding, analysis and images in one place Used from the browser with nothing to install	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
Features and limits vary by plan Hosted service, so prompts are processed on OpenAI's servers	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
Web application	Downloadable app
Closed source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 20, 2026

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