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Description

Muse Code is a beta terminal coding agent from Meta designed to help developers complete complex software engineering work across large codebases. Powered by Muse Spark 1.2, the agent can plan repository changes, write code, run validation steps, and coordinate persistent subagents for difficult development tasks. Muse Code uses a simple main agent loop supported by async background agents that remain active throughout each session. These background agents can gather information, carry out next steps, and decide when to report back to the main agent, reducing latency and unnecessary user steering. The runtime is built around a local event log where every model call, tool run, approval, and edit is appended. This event log makes Muse Code replay-exact and restart-safe, allowing it to resume from the point of failure after a crash. Muse Code also ships with default skills, including /plan, /grill, and /goal, to support structured planning, plan validation, and objective completion. It can be installed on macOS or Linux and is integrated with Meta’s AI developer ecosystem. By combining terminal-based coding, persistent subagents, replay-safe execution, bundled skills, and Muse Spark 1.2, Muse Code helps developers automate larger and longer software engineering workflows.

Description

Reason functions as an independent software engineering and AI coding assistant, capable of managing genuine programming tasks, from exploring codebases and resolving issues to developing features and validating outcomes. It operates seamlessly across interconnected repositories, local systems, and cloud platforms, granting developers the ability to assign duties without disrupting their ongoing processes. The tool can navigate through codebases, track function calls, replicate errors, modify files, execute tests, and generate validated pull requests for human examination. Its research features deliver substantiated insights with references directly linked to specific source files and lines, while its repository memory ensures the retention of knowledge for subsequent sessions. Reason further enhances productivity by supporting concurrent subagents, creating isolated work environments, scheduling work periods, and automating workflows for both development and operational tasks. Teams are empowered to connect their repositories, oversee permissions, scrutinize code modifications, and assess builds, regression tests, and deployment validations prior to merging, ultimately streamlining the development pipeline. With its comprehensive suite of capabilities, Reason not only optimizes efficiency but also fosters a collaborative environment among developers.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Meta AI Yes 
Muse Glimmer Yes 
Muse Spark Yes 
Muse Spark 1.1 Yes 
Muse Spark 1.2 Yes 
Muse Spark 1.3 Yes 
Muse Wonder Yes 
Muse Wonder Full Yes 
Slack No 

Integrations

Meta AI No 
Muse Glimmer No 
Muse Spark No 
Muse Spark 1.1 No 
Muse Spark 1.2 No 
Muse Spark 1.3 No 
Muse Wonder No 
Muse Wonder Full No 
Slack Yes 

Pricing Details

$1.25 per 1M tokens (input)
Standard pricing: $1.25 per million input tokens and $4.25 per million output tokens

Discounted "contributor" tier costing $0.10 per million input tokens and $0.20 per million output tokens for users who agree to share feedback to improve the AI.
Free Trial No 
Free Version Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based No 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows Yes 
Mac Yes 
Linux Yes 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac Yes 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Meta

Founded

2004

Country

United States

Website

meta.ai

Vendor Details

Company Name

Reason

Founded

2026

Country

United States

Website

reasonmachines.com

Alternatives

Alternatives

No Alternatives
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