Aider

Name: Aider
Brand: Aider

An open-source AI pair programmer for your terminal, compatible with Claude, GPT, and local LLMs.

softwareAI Code Assistants Open SourceCLI ToolAI Pair Programming

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Our Verdict

Best for

Developers who want a free, open-source, terminal-native AI coding agent with model flexibility.

Skip if

You want a polished GUI or fully-managed IDE integration.

What is Aider?

Aider is an open-source command-line tool for AI-assisted software development, described as "AI pair programming in your terminal." It builds a map of an entire codebase for context, supports over 100 programming languages, and lets developers connect their choice of LLM, including Claude 3.7 Sonnet, DeepSeek, OpenAI models, or local models, rather than locking users into one provider. Aider automatically commits changes to git with descriptive messages, can accept images and web pages as visual context, and includes voice-to-code input plus built-in linting and automated testing. It has over 44,000 GitHub stars and more than 6.8 million pip installations, with an active Discord community.

SpecificationsAI-estimated

deploymentDesktop App

open source✅ Yes

Key Features of Aider

Aider builds an intelligent map of an entire codebase so the AI has relevant context across files, not just the open one.

It supports 100+ programming languages and works with a wide range of LLMs including Claude 3.7 Sonnet, DeepSeek, OpenAI models, and local models.

Every AI-assisted change is automatically committed to git with a descriptive commit message.

It accepts images and web pages as additional input for visual or reference context.

A voice mode lets developers dictate coding instructions instead of typing them.

Built-in linting and automated testing help catch issues introduced by AI-generated changes.

As an open-source project, it has over 44,000 GitHub stars and 6.8 million pip installs.

Use Cases for Aider

Refactoring a codebase

Ask Aider to make a change across multiple files and let it commit the result to git automatically.

Bootstrapping a new project

Describe a new project from scratch and have Aider scaffold it in your terminal.

Choosing your own model

Connect Aider to Claude, GPT, DeepSeek, or a local LLM depending on cost or privacy needs.

Hands-free coding

Use voice-to-code to dictate instructions while working.

Pros & Cons of Aider

Pros

Fully open source and free to run
Works with almost any LLM provider, avoiding lock-in
Automatic git commits keep a clean history of AI changes
Large, active open-source community

Cons

Requires comfort with the terminal/command line
Users must supply and pay for their own LLM API access
No official GUI -- IDE integration is comment-based rather than native

Frequently Asked Questions

Is Aider free?

Yes, Aider itself is open source and free; you only pay for the LLM API you connect.

What languages does Aider support?

Over 100 programming languages.

Does Aider work with local LLMs?

Yes, in addition to hosted models like Claude and GPT.

Does Aider integrate with git?

Yes, it automatically commits AI-made changes with descriptive messages.

Pricing Overview

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Free

Detailed plans are not listed. Visit the official website for pricing information.

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