Aider: Terminal AI Coding

Aider: Terminal AI Coding

Aider is an open-source, terminal-based AI coding assistant with a distinctive philosophy: works with any model, integrates natively with Git, and is designed specifically for existing codebases.

Model-Agnostic by Design

Unlike commercial tools tied to a specific provider, Aider works with: - Claude 3.5 / 3.7 Sonnet (Anthropic API) - GPT-4o or o3-mini (OpenAI API) - Gemini Pro (Google API) - Local models via Ollama or LM Studio

Git-Native Commits

Every change Aider makes is automatically committed with a descriptive message. This means: - Complete, reviewable history of every AI edit - Rolling back is as simple as git revert - Code review follows your existing PR workflow - Your Git history is the source of truth

Architect Mode

Separates planning from execution. A powerful model (e.g., o3) handles high-level reasoning; a faster, cheaper model (e.g., GPT-4o) handles the actual code edits. Better results at lower cost.

Aider vs Claude Code

| Aspect | Aider | Claude Code | |---|---|---| | Model | Any (your choice) | Claude | | Git integration | Auto-commits | Manual | | Open source | Yes (MIT) | No | | Command execution | Limited | Full (with permission) | | Best for | Existing codebases | Complex agentic tasks |

When Aider Shines

• Existing codebases with good Git history
• Teams needing auditability — every AI change is a first-class commit
• Budget-conscious developers routing to cheaper or local models
• Privacy-conscious workflows — route to local, nothing leaves your machine