A state-of-the-art coding agent for cost efficiency
Reason is the best coding agent, in the cloud or locally. Give it a task and it writes code, runs tests and opens a pull request. Use Reason from the Mac app, terminal, web or Slack, with your choice of models and connected subscriptions. Start free on your own computer. Our published GPT-6 Astra evaluation scores 65.1 on the Coding Agent Index vs Codex’s 62.5, at 22% lower cost per solved task.
Coding agents write good code, but they’re still tied to your laptop. Close the lid and they die, your RAM caps how many you can run, and you still have to check every diff yourself.
the solution
Reason splits the agent in two. The brain (the harness) runs detached in the cloud and drives separate hands (a sandboxed machine). Sessions survive crashes, deploys and lost boxes, can be rewound, and hop between cloud Linux, a cloud Mac and your own Mac without losing state.
And it does more for less. On GPT-6 Astra, Reason scores 65.1 vs Codex’s 62.5 on the Coding Agent Index at 22% lower cost per solved task, and it’s 15–23% cheaper per attempt on every benchmark. On GPT-6.1 Sol, median cost per task is 34% below Codex. Every score links to a public Harbor job.
What’s inside
Built for the cache: a small set of tools and a short prompt, and each request only appends, so every turn is fully cache-eligible. That’s where the savings come from.
A computer per session: full desktop, live browser and terminals, with your saved logins. Take the wheel any time.
PRs with proof: walkthrough video and before/after screenshots go on every PR, then review, CI fixes and the merge queue.
Bring your own subs: plug in the coding plans you already pay for. When one hits its rate limit, Reason rolls over to the next.
Resume any agent: import a Claude Code, Codex, OpenCode or Devin session and keep going.
“A state-of-the-art coding agent for cost efficiency”
Reason launched on Product Hunt on October 14th, 2026 and earned 118 upvotes and 16 comments, placing #8 on the daily leaderboard. Reason is the best coding agent, in the cloud or locally. Give it a task and it writes code, runs tests and opens a pull request. Use Reason from the Mac app, terminal, web or Slack, with your choice of models and connected subscriptions. Start free on your own computer. Our published GPT-6 Astra evaluation scores 65.1 on the Coding Agent Index vs Codex’s 62.5, at 22% lower cost per solved task.
On the analytics side, Reason competes within Productivity, Developer Tools and Artificial Intelligence — topics that collectively have 1.7M followers on Product Hunt. The dashboard above tracks how Reason performed against the three products that launched closest to it on the same day.
Who hunted Reason?
Reason was hunted by Adi Singh. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Reason including community comment highlights and product details, visit the product overview.
Adi Singh
hey developers 👋
the problem
Coding agents write good code, but they’re still tied to your laptop. Close the lid and they die, your RAM caps how many you can run, and you still have to check every diff yourself.
the solution
Reason splits the agent in two. The brain (the harness) runs detached in the cloud and drives separate hands (a sandboxed machine). Sessions survive crashes, deploys and lost boxes, can be rewound, and hop between cloud Linux, a cloud Mac and your own Mac without losing state.
And it does more for less. On GPT-6 Astra, Reason scores 65.1 vs Codex’s 62.5 on the Coding Agent Index at 22% lower cost per solved task, and it’s 15–23% cheaper per attempt on every benchmark. On GPT-6.1 Sol, median cost per task is 34% below Codex. Every score links to a public Harbor job.
What’s inside
Built for the cache: a small set of tools and a short prompt, and each request only appends, so every turn is fully cache-eligible. That’s where the savings come from.
A computer per session: full desktop, live browser and terminals, with your saved logins. Take the wheel any time.
PRs with proof: walkthrough video and before/after screenshots go on every PR, then review, CI fixes and the merge queue.
Bring your own subs: plug in the coding plans you already pay for. When one hits its rate limit, Reason rolls over to the next.
Resume any agent: import a Claude Code, Codex, OpenCode or Devin session and keep going.
our ask
Try it at reasonmachines.com and tell us what broke: contact@reasonmachines.com