Aider

Freemium

An AI coding assistant to edit code, manages files, and integrates with Git via command-line interface.

Aider is a command-line AI pair programming tool that enables developers to edit code and manage files through a terminal interface. It features deep Git integration for automatic commits, codebase mapping for large projects, and support for over 100 languages. It is designed for engineers who want to implement features, fix bugs, and run tests using cloud or local LLMs (verified: 2026-01-29).

Jan 29, 2026
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Pricing: Freemium
Last verified: Jan 29, 2026
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Key facts

Pricing

Freemium

Use cases

Software developers implementing new features or bug fixes across multiple files within an existing codebase via a terminal interface (verified: 2026-01-29), Engineers automating the creation of unit tests and documentation updates while maintaining a consistent Git commit history (verified: 2026-01-29), Programmers working on large projects who require an automated codebase map to provide context for complex multi-file code changes (verified: 2026-01-29)

Strengths

Integrates directly with Git to automatically commit code changes with descriptive messages and allows users to undo modifications easily (verified: 2026-01-29), Supports a wide range of LLMs including Claude 3.7 Sonnet, OpenAI o1, and local models via providers like Ollama or LM Studio (verified: 2026-01-29), Includes built-in functionality to automatically run linters and test suites, fixing detected errors during the code generation process (verified: 2026-01-29)

Limitations

Requires users to provide their own API keys for cloud-based LLMs or set up local model environments independently (verified: 2026-01-29), Operates primarily as a command-line interface tool which necessitates familiarity with terminal-based workflows and Git version control (verified: 2026-01-29)

Last verified

Jan 29, 2026

Strengths

  • Integrates directly with Git to automatically commit code changes with descriptive messages and allows users to undo modifications easily (verified: 2026-01-29)
  • Supports a wide range of LLMs including Claude 3.7 Sonnet, OpenAI o1, and local models via providers like Ollama or LM Studio (verified: 2026-01-29)
  • Includes built-in functionality to automatically run linters and test suites, fixing detected errors during the code generation process (verified: 2026-01-29)

Limitations

  • Requires users to provide their own API keys for cloud-based LLMs or set up local model environments independently (verified: 2026-01-29)
  • Operates primarily as a command-line interface tool which necessitates familiarity with terminal-based workflows and Git version control (verified: 2026-01-29)

FAQ

How does Aider handle large codebases when communicating with an LLM?

Aider creates a map of the entire codebase to provide the LLM with necessary context. This mapping process allows the tool to understand relationships between different files in larger projects, ensuring that the AI has a comprehensive view of the repository structure before suggesting or implementing changes (verified: 2026-01-29).

Which programming languages and file types is Aider compatible with?

Aider supports over 100 programming languages including Python, JavaScript, Rust, Ruby, Go, C++, and PHP. Beyond standard source code, the tool can also edit configuration files and text files, making it versatile for various development tasks across different software stacks and project environments (verified: 2026-01-29).

Can Aider be used with local models instead of cloud APIs?

Yes, Aider can connect to local LLMs through various providers and OpenAI-compatible APIs. This flexibility allows developers to work without relying on external cloud services by using tools like Ollama or LM Studio to host models locally on their own hardware (verified: 2026-01-29).