Coding agent · Cloud / CLI / Desktop

Reason

Reason is a Cloud / CLI / Desktop in the 2026 agents.dancingteeth catalog. Hosted GitHub issue→PR coding agents with review artifacts (screen recordings, logs, diffs) across web, CLI (`reason`), macOS, iOS, and Slack — Pi harness with parallel codemode tool calls.

Last updated

Verified

Best for

Hosted GitHub issue→PR coding agents with review artifacts (screen recordings, logs, diffs) across web, CLI (`reason`), macOS, iOS, and Slack — Pi harness with parallel codemode tool calls.

Skip if

You need fully local agent execution (Reason runs in their cloud even from CLI), open source, published pricing, or you meant Reasonix (DeepSeek terminal agent).

Who it fits

  • Hosted GitHub issue→PR coding agents with review artifacts (screen recordings, logs, diffs) across web, CLI (`reason`), macOS, iOS, and Slack — Pi harness with parallel codemode tool calls.
  • Builders who start in the browser without a local IDE setup
  • Terminal-first engineers who live in the shell and git
  • People who prefer a dedicated desktop coding surface
  • Users who supervise or kick off agent runs from mobile
Experimental

Pros

Autonomous GitHub engineer: assign an issue and cloud agents open PRs with screen recordings, logs and review-ready diffs; built on the Pi harness with a codemode tool that runs tools in parallel in one call and a cache-friendly prompt; runs on many models; `reason` CLI runs locally, in the cloud (--cloud) or on your own server (--on); macOS app can use your local checkout and ports; iOS and Slack; HTTP API.

Cons

Benchmark lead is self-reported (Coding Agent Index 65.1 vs Codex 62.5 on GPT-6 Astra, their own preliminary harness runs, no independent verification yet); the agent always runs in Reason's cloud, even from the CLI; closed source product; no public price list; young company (Ara Software, Inc.).

Facts

Locality:
Hybrid (local + cloud)
Surfaces:
Web, CLI, Desktop, Mobile
Maturity:
Experimental
Cloud agents:
Remote agent execution
Verified:
Oct 2026

Agent standards & memory

AGENTS.md: PartialSKILL.md: UnknownRules / memory: Cloud sessions keep their messages and results across web, iOS and macOS.Free and paid plans (prices not published); YC companies get $1,000 in credits through Bookface.

Compare one neighbor first

Vendor pages sell hard. Read one alternative on this site, then leave for the official link if the fit still holds.

Alternatives

Frequently asked questions

What is Reason?

Reason is a Cloud / CLI / Desktop covered in the agents.dancingteeth 2026 catalog. Autonomous GitHub engineer: assign an issue and cloud agents open PRs with screen recordings, logs and review-ready diffs; built on the Pi harness with a codemode tool that runs tools in parallel in one call and a cache-friendly prompt; runs on many models; `reason` CLI runs locally, in the cloud (--cloud) or on your own server (--on); macOS app can use your local checkout and ports; iOS and Slack; HTTP API.

Who is Reason best for?

Hosted GitHub issue→PR coding agents with review artifacts (screen recordings, logs, diffs) across web, CLI (`reason`), macOS, iOS, and Slack — Pi harness with parallel codemode tool calls.

When should I skip Reason?

You need fully local agent execution (Reason runs in their cloud even from CLI), open source, published pricing, or you meant Reasonix (DeepSeek terminal agent).

What are the main trade-offs of Reason?

Pros: Autonomous GitHub engineer: assign an issue and cloud agents open PRs with screen recordings, logs and review-ready diffs; built on the Pi harness with a codemode tool that runs tools in parallel in one call and a cache-friendly prompt; runs on many models; `reason` CLI runs locally, in the cloud (--cloud) or on your own server (--on); macOS app can use your local checkout and ports; iOS and Slack; HTTP API. Cons: Benchmark lead is self-reported (Coding Agent Index 65.

Does Reason support AGENTS.md, SKILL.md, or MCP?

This card lists AGENTS.md as Partial, SKILL.md as Unknown, and rules/memory as Cloud sessions keep their messages and results across web, iOS and macOS.. Free options: Free and paid plans (prices not published); YC companies get $1,000 in credits through Bookface..

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