Aider

What it is

Aider is an AI-powered tool designed to enhance the coding experience directly from the terminal. It supports AI pair programming by integrating with popular AI models like GPT-3 and GPT-4, allowing developers to receive real-time code suggestions and improvements. Written in Python, Aider is open-source and has gained significant traction in the developer community, as evidenced by its high number of stars and forks on GitHub. However, its npm package appears to be less active, with no recent downloads or updates.

Real-time AI pair programming directly in the terminal.

When it fits — and when it doesn’t

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

1. 01

   Aider is not optimized for performance in very large monorepos, requiring manual configuration to ignore irrelevant parts of the codebase.

   The FAQ explicitly states that while Aider works in large repos, it is not optimized for quick performance and requires users to use switches like --subtree-only or .aiderignore to improve speed.

   Source: aider.chat/docs/faq.html ↗
2. 02

   Aider cannot work with multiple git repositories simultaneously, forcing users to use workarounds like reading files from other repos.

   The FAQ states that Aider can only work with one repo at a time, requiring users to manually share context via /read commands or generated maps for interrelated repos.

   Source: aider.chat/docs/faq.html ↗
3. 03

   Aider lacks a built-in 'supervised mode' to force user confirmation for every atomic change, which is a requested feature for safety-critical workflows.

   An open issue with 41 reactions requests a feature to force the AI to ask for confirmation before applying each change, indicating this capability is currently missing.

   Source: GitHub issue #649 ↗

What it does well

• High community engagement

  48690 stars and 4919 forks on GitHub

• Supports multiple AI models

  Integrates with GPT-3, GPT-4, and others

• Open-source

  Available under Apache-2.0 license

Pricing

Free tier

Yes

Paid from

—

Model

N/A

Enterprise plan

No

Pricing last confirmed Oct 4, 2026.