Aider.chat
Last Updated on: Feb 4, 2026
Aider.chat
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AI Code Assistant
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AI Assistant
What is Aider.chat?
Aider.chat is an open-source AI pair‑programming assistant you run from your terminal. It connects to LLMs (like Claude 3.7 Sonnet, DeepSeek R1, GPT‑4o, and more) to write, refactor, and test code across your repository—integrated with Git to auto-commit changes, display diffs, and maintain full project context.
Who can use Aider.chat & how?
Who Can Use It?

  • Software Developers & Engineers: Automate coding tasks, refactors, and multi-file edits using conversational prompts.
  • Technical Leads & Architects: Enforce patterns and structure via AI workflows while preserving code standards.
  • Open-Source Contributors & DevOps Teams: Customize agent workflows, incorporate local LLMs, and extend via scripting.
  • Learners & Educators: Use voice-to-code inputs, natural language commands, and AI-assisted debugging walkthroughs.
  • Budget-Conscious Projects: Operates via pay-as-you-go LLM hosting—no proprietary subscription needed, processing files for as low as $0.007 per file.

How to Use Aider.chat?

  • Install Quickly: Run pip install aider-install or use system/scripted installers (macOS, Linux, Windows).
  • Initialize Chat Sessions: Launch Aider in a Git repo with specific files or entire project; it first maps your codebase for contextual awareness.
  • Chat & Edit with AI: Issue natural language commands like “add a search feature,” “refactor this module,” or “write tests.” AI replies with diffs and optional auto-commits.
  • Manage Changes and Review: Use /diff, /undo, or Git tools to inspect changes; disable auto-commit if preferred.
  • Switch Models On the Fly: Toggle between models (e.g. GPT 4o, Claude, DeepSeek or local models) using /model.
What's so unique or special about Aider.chat?
  • True AI Pair Programming in Terminal: Conversational editing across multi-files, without copy/paste, fully integrated with Git workflows.
  • Supports Large Codebases: Builds a repo map to effectively understand and operate across projects of any size.
  • Cost-Efficient AI Coding: Pay per file processed via the LLM provider; users report low per-charge cost (~$0.007/file).
  • Voice-to-Code & Visual Context: Supports voice comands, and you can upload images or web context to guide AI behavior.
Things We Like
  • GPT-powered, terminal-native development boosts productivity with minimal manual effort.
  • Auto-commits and diffs simplify reviewability when collaborating or using CI workflows.
  • Supports open-source flexibility—local LLMs, model choice, and scriptable customization.
Things We Don't Like
  • Strong reliance on Git workflows; novice users may need time to adapt.
  • Terminal-first interface lacks point-and-click ease of GUI-based IDE assistants.
  • AI can sometimes apply unintended changes; requires careful prompt design and occasional manual review.
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FAQs

Aider.chat is a command-line driven AI pair-programming assistant that edits code across your repo, using LLMs like GPT‑4o or Claude, with version control built-in.
Works with Claude 3.7 Sonnet, GPT‑4o, DeepSeek R1, o3‑mini, and many local models—switchable via /model.
Aider itself is open-source and cost-free. You pay only for LLM usage via API—costs around $0.007 per file.
Yes—it maps full repo context and can coordinate edits across many files, making it effective for real codebases.
AI modifications are previewed as diffs and auto-committed to your Git repo. You can review or undo at any time.

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