Aider

Aider

Aider AI
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About

Aider is an AI pair-programming tool that runs directly in your terminal, helping developers build new projects or improve existing codebases using large language models. It works with both cloud-based and local LLMs, giving developers flexibility in how they use AI. Aider understands your entire codebase by mapping it, making it especially effective for larger projects. It supports over 100 programming languages and integrates tightly with Git for safe, trackable changes. Developers stay in control while accelerating development through natural language instructions.

About

Muse Code is Meta’s terminal coding agent, powered by Muse Spark 1.2, for handling complex software engineering tasks across large repositories. The agent can plan changes, write code, validate results, and coordinate multiple persistent subagents during development sessions. Muse Code uses async background agents that stay active throughout a session to reduce repeated information gathering and help complete multi-step tasks with less steering. Its runtime uses a local event log that records model calls, tool runs, approvals, and edits so sessions can be replayed and resumed after failures. Muse Code includes bundled skills such as /plan for approval-gated planning, /grill for stress-testing plans, and /goal for working toward completion. Built for AI developers and software teams, Muse Code helps automate coding workflows, long-running engineering tasks, debugging, and repository-level development.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Aider is ideal for software developers, engineers, and technical teams who want to accelerate coding, refactoring, and testing workflows using AI directly within their existing development environments

Audience

Software engineers, AI developers, coding agent users, platform teams, DevOps teams, ML engineers, research teams, enterprise development teams, and organizations that need terminal coding agents, repository automation, code generation, debugging, validation, persistent subagents, replay-safe execution, long-running coding workflows, and end-to-end software development support

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Open source
Free Version
Free Trial

Pricing

$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 Version
Free Trial

Reviews/Ratings

Overall 5.0 / 5
features 5.0 / 5
design 5.0 / 5

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5

Pros & Cons from Real Users

Pros

  • Aider is one of those developer tools that feels simple in the best way. It runs in the terminal, works with my existing repo, edits files directly, and fits naturally into a Git-based workflow instead of forcing me into a whole new IDE. I really like that it is open source and model-flexible. Being able to use different LLMs, including cloud and local models, makes it much more useful for developers who care about cost, privacy, speed, and picking the right model for each job. The repo-aware workflow is a big win too. Aider can map a larger codebase, make multi-file changes, and help with real tasks like refactoring, fixing bugs, adding tests, and building features. That makes it feel more like pair programming than just asking a chatbot for snippets. The Git integration is also great. Since Aider works inside a local Git repo, it is easy to review changes, keep diffs clean, and roll back anything that does not look right.

Cons

  • Aider is still a tool for developers, not a magic autopilot. You need to understand your codebase, review the diffs, run tests, and guide it clearly if you want good results. It can also get expensive or noisy if you throw huge tasks at it without scoping the work. Like most coding agents, it performs best when you give it focused instructions, add the right files to context, and keep an eye on what it is changing. I would also be cautious with secrets, shell commands, and production-sensitive repos. Aider is powerful because it can work directly with your code, but that means you still need good review habits and guardrails.

Pros & Cons from Real Users

Pros

  • Muse Code looks exciting because Meta is finally going after coding agents directly, not just releasing another general AI model. A terminal-based agent that can write code, inspect software, run tests, and validate changes is exactly the kind of workflow developers actually care about. The pricing angle is a big deal. Meta is pitching Muse Code as one of the more affordable coding agents, with a lower-cost tier that is reportedly less than one-tenth the cost of its general Muse Spark model. That matters if you use coding agents all day instead of just for the occasional refactor. I also like that it is powered by Muse Spark 1.2, which sounds more focused on software engineering than earlier Muse Spark releases. If Meta can make the agent reliable inside real repos, Muse Code could become a serious daily tool.

Cons

  • It is still in beta, so I would not trust it blindly yet. Coding agents need to prove themselves on messy codebases, failing tests, weird dependencies, security-sensitive changes, and long multi-step tasks. I would also want to see more independent developer feedback. Meta’s pricing and positioning are interesting, but the real test is whether Muse Code can consistently make good changes without wasting time or creating cleanup work.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Aider AI
aider.chat/

Company Information

Meta
Founded: 2004
United States
meta.ai

Alternatives

Devin Desktop

Devin Desktop

Cognition

Alternatives

Claude Code

Claude Code

Anthropic
Claude Code

Claude Code

Anthropic

Categories

Categories

Integrations

Amazon Bedrock
C
C#
Claude Mythos 5
Claude Sonnet 3.7
Claude Sonnet 4
Command R+
DeepSeek R1
DeepSeek V3.1
DeepSeek-V3
Gemini 3 Flash
Gemini 3.5 Pro
Git
Go
Muse Glimmer
Muse Spark 1.2
OpenAI o1
OpenAI o3
OpenAI o3-mini
TypeScript

Integrations

Amazon Bedrock
C
C#
Claude Mythos 5
Claude Sonnet 3.7
Claude Sonnet 4
Command R+
DeepSeek R1
DeepSeek V3.1
DeepSeek-V3
Gemini 3 Flash
Gemini 3.5 Pro
Git
Go
Muse Glimmer
Muse Spark 1.2
OpenAI o1
OpenAI o3
OpenAI o3-mini
TypeScript
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