Reason

Reason

Reason is a coding-focused autonomous AI programming agent that can autonomously carry out software engineering tasks on your computer, with support for starting and viewing tasks from your phone.

Last Updated 10/14/2026

About Reason

Reason is a coding agent from Reason Machines. Its website describes it as a coding-focused AI agent that can autonomously execute tasks on your computer—for example, reading billing export files, writing queries, generating charts, and launching an app—then opening the dashboard in your browser to verify the results. An official mobile entry point is also available, letting users start tasks from their phone and check progress anytime. The website also cites a study claiming that Reason outperforms Codex and is 22% more cost-efficient.

Best for

Developers who need an AI coding assistant
Engineers who need to start and follow up on tasks remotely from their phone

Best use cases

Build an AI spend dashboard from billing export data

Speed up automation tasks such as overnight exports

Start tasks from your phone and follow up remotely

Features

Autonomous coding tasks

Reason can autonomously carry out multi-step tasks on your computer, such as writing queries, generating charts, and launching an app.

Data processing and dashboard building

The website demonstrates building an AI spend dashboard broken down by employee and model from a billing export file, then opening it in the browser to verify it.

Mobile task management

Start tasks from your phone via the mobile entry point and check on their progress anytime.

FAQ

The website shows an example of Reason completing an "AI spend dashboard" task on a computer from a single instruction: reading a billing export file, writing queries, generating charts, launching the app, and opening the dashboard—finally cross-checking the December figures against the exported data.
Yes. The official website provides a mobile entry point for Reason, so users can start tasks from their phone and check progress from anywhere.
The website published a research blog stating that Reason outperforms Codex and is 22% more cost-efficient.

Tool Information

DeveloperReason
Release Date10/14/2026
PricingFree