Aider
Free tierAI pair programming in your terminal — code smarter with LLMs
Free·Technical·Powered by Multi-provider: Anthropic (Claude 3.7 Sonnet), DeepSeek (R1 & Chat V3), OpenAI (o1, o3-mini, GPT-4o), and local models·Open source
Key strengths
Codebase mapping for large projectsSupports 100+ programming languagesGit integration with auto-commitMulti-LLM support including local modelsIDE integration via code commentsVoice-to-code capabilityAutomatic linting and testingImage and web page context support
Completely free
Founded 2023
Self-hostable
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Recent changes
- Models updated: Multi-provider: Anthropic (Claude 3.7 Sonnet), DeepSeek (R1 & Chat V3), OpenAI (o1, o3-mini, GPT-4o), and local models
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- Large codebase refactoring: Aider's repository mapping keeps the LLM oriented across complex, multi-file projects, making it suitable for refactoring tasks that span many modules.
- Multi-LLM experimentation: Developers can benchmark or switch between Anthropic, OpenAI, DeepSeek, and local models within the same workflow to optimize for cost, latency, or capability.
- Automated Git-tracked development: AI-generated edits are auto-committed, enabling clean, auditable change histories during rapid prototyping or feature development.
- Local/air-gapped environments: Support for local LLMs allows use in security-sensitive or offline environments without sending code to external APIs.
- Polyglot projects: With support for 100+ languages, Aider suits teams working across mixed-language stacks.
- CI-adjacent workflows: Automatic linting and test execution after each AI edit helps catch regressions immediately within the terminal session.
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