Aider
4.4
Aider is an open-source pair programmer in the terminal, tightly integrated with git so that every change the AI makes arrives as a diff you can inspect and revert one commit at a time.
- Commercial use OK
- Free tier
- Pricing
- Free (OSS / BYOK)
- Free tier
- Open source
- Commercial use
- Permitted
- Japanese UI
- Not confirmed
- Enterprise contract
- Not confirmed
What it is good for
- Developers comfortable with git and diff review
- Work on production repositories where traceability matters
- Switching between models on your own API keys
Strengths and trade-offs
Strengths
- Every AI change is a reviewable, revertible commit
- Costs only your API usage (BYOK)
- Switch between Claude Sonnet, GPT-4o, DeepSeek and others
Trade-offs
- No GUI; command-line fluency assumed
- Editor integration means running Aider beside your editor, not inside it
Editors' review
Terminal pair programming with git built in — transparent, diff by diff
Aider is an open-source AI pair programmer that runs in the terminal. Its distinguishing feature is transparency: it integrates tightly with git, so each AI-generated diff can be reviewed and reverted one commit at a time.
Being open source, the only cost is API usage on your own keys, across Anthropic, OpenAI, Bedrock and others. You can switch or combine models — Claude Sonnet, GPT-4o, DeepSeek — as the task warrants.
There is no GUI, and it is not a VS Code extension, so the usual pattern is running Aider in a terminal next to whichever editor you prefer.
Verdict
For individual developers fluent in git. Being able to follow exactly what the AI changed, commit by commit, makes it safer against a production repository than most alternatives.
Compiled from official documentation and public sources, with our own editorial judgement. We do not publish figures we cannot source.
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