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Reasonix vs Aider: catalog facts
Reasonix	Aider
Free Free and open source under MIT; you pay for the model API usage it consumes.	Free Aider itself is free and open source under Apache 2.0. You pay whatever your chosen model…
Windows, Command line	Windows, macOS, Linux, Command line
Per-turn checkpoints let you undo any step of a run Plan mode, permission prompts and a workspace sandbox	Commits every change to git automatically, so the usual diff and revert tools work Maps the whole codebase, which is what makes it usable on projects of real size
Built around DeepSeek models rather than a wide choice of providers Requires a paid model API to do any work	Needs an API key and per-token spend unless you run a local model Terminal-driven; there is no graphical interface
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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