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Stable Assistant vs Mammouth: catalog facts
Stable Assistant	Mammouth
Paid Subscription service from Stability AI; check the site for current plans.	Paid Subscriptions start at 10 euros per month.
Web	Web
Chat interface for generation and editing Inpainting, erase and search-and-replace tools	Many text and image models in one subscription One-click reprompting with a different model
Requires an account and internet connection Limited to Stability AI's own models	No free tier mentioned Hosted service that needs an account
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

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