Reason is a state-of-the-art coding agent built for cost efficiency. In benchmarks like Terminal Bench 4.0 and DeepSWE, it scored higher than harnesses like Codex and Pi while costing 22% less. Reason runs in the cloud or on your own machine. Give it a task, and it writes code, runs tests, and opens a pull request. You can use it from the Mac app, terminal, web, or Slack, with your choice of models and connected subscriptions. Start free on your computer or in the cloud.
Launch Team / Built with
SM
LT
AS
SV
Launch Date:
October 20, 2026