Aider

By Aider

AI pair programming in your terminal — edits your code and auto-commits each change to git.

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No updates in 6+ monthsv0.86.02025-08-09PythonApache-2.0

#coding #terminal #git #pair-programming

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Doc version 1.0 · Updated June 28, 2026

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Overview

Aider is “AI pair programming in your terminal”: you chat about a change and it edits the files directly.
It is git-native — every change is auto-committed with a sensible message, so the history stays clean and any edit is easy to undo.

flowchart LR
  you[you] --> aider[Aider]
  aider --> model[model]
  model --> diff[edit + git commit]

The Code samples tab shows an interactive session and a scripted one-shot edit — pick from the selector to compare.

When to use it

Reach for Aider when you want fast, conversational edits to an existing repository with disciplined, reversible git history — and any model via LiteLLM.

Example

Shell · interactive

When to use

Reach for Aider for hands-on, conversational edits in the terminal with a clean git history.

How it flows

Aider sends your request plus the relevant files to the model, applies the diff, and commits each change.

Structure

flowchart LR
  you[you] --> aider[Aider]
  aider --> model[model]
  model --> diff[edit + git commit]

python -m pip install aider-chat

export ANTHROPIC_API_KEY=...
# Pair-program on a file; --model is a LiteLLM-style name, any provider works.
aider --model anthropic/claude-opus-4-8 app.py

When to use

Use --message to script a single edit — handy in tasks or CI.

How it flows

Aider runs one turn against the named files, commits the result, and exits.

Structure

flowchart LR
  msg[--message] --> aider[Aider]
  aider --> commit[one edit + commit]

# Non-interactive: make a single change and exit.
aider --model openai/gpt-4o --message "add a docstring to main()" app.py

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Overview

When to use it

Pricing

When to use

How it flows

When to use

How it flows