Aider

AI & Coding Tools

Free (open source), you pay for API usage

Open-source terminal AI that edits your code and makes clean git commits automatically

Aider is a terminal tool that pair-programs with you. You tell it what to change, it edits the files, and (here is the part that wins people over) it creates a clean git commit with a descriptive message. Every change is tracked, reviewable, and revertable. No other AI coding tool handles version control this naturally.

Built by Paul Gauthier, it builds a map of your whole repository so it can work on larger codebases. The tradeoff is that it is terminal-only and requires you to bring your own API key, and there is a learning curve to getting the most out of it (knowing which files to add, how to prompt). Development has also slowed: the latest release, v0.86.0, came out in August 2025, and the repository has had no new commits since May 2026, so support for newer models may lag. If you are already comfortable with git and the command line, aider fits into your workflow like a glove. If you want a visual editor experience, look at Cursor or Cline instead.

Best for Developers who code in the terminal and want an AI pair programmer that commits each change to git.

Plans

Aider plans
PlanPriceIncludes
Open source$0Apache-2.0 licence; you supply your own LLM API key or run a local model

Prices checked on the vendor's page

Pros

  • Git-aware: every change is a well-described commit you can review or revert
  • Works with Claude, OpenAI and DeepSeek models, plus local models
  • Maps your whole codebase and can run linters and tests after each change

Cons

  • Terminal-only: no GUI, no visual diff preview
  • API costs are yours to manage and can add up with large context
  • Development has slowed: the latest release, v0.86.0, came out in August 2025

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