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aider

AI pair programming in your terminal

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PricingFree

APINone

PlatformsWeb, macOS

AddedJul 2026

Overview

aider is an open source AI pair programming tool that runs in your terminal, allowing you to edit files, complete complex requests, and automatically generate compact repository maps for LLM context.

Key features

10 highlights

Terminal-based AI pair programming

Automatic repository mapping for LLM context

Ability to ignore files using .aiderignore

Flexible config files (YAML support)

Subtree-only targeting switch

Compatible with multiple LLM providers

Custom model settings overrides

Opt-in anonymous analytics

Scriptable command-line interface

Interactive code editing alongside the AI

Pricing

Pricing not confirmed

We haven't verified a structured pricing table from the vendor's website. Check the tool's official pricing page for the latest.

Pros

Runs directly in your terminal, acting as an AI pair programmer.
Entirely open source, enabling users to audit the source code including analytics.
Automatically creates a compact repository map to provide contextual relevance to LLMs.
Allows manual editing of files in your favorite editor while aider is actively running.
Provides file filtering features through a .aiderignore file using standard gitignore conventions.
Supports narrowing down focus in large monorepos with the --subtree-only command switch.
Supports a wide variety of LLMs including OpenAI, Anthropic, Gemini, GROQ, DeepSeek, and locally run models.
Allows complete opt-out of anonymous analytics with a simple one-time command.

Cons

Currently only works with one git repository at a time.
Not optimized for fast performance and quick response times in very large repositories.
The command may not be available on the shell path by default in some operating systems like Windows.
Utilizing Sonnet 3.7 thinking tokens currently requires manual configuration via YAML settings.
Does not provide built-in free LLM access; users must configure and provide their own API keys.