Aider
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AI pair programming in the terminal — edit existing codebases with LLMs
Key Features
Multi-Agent
Single Agent
Human-in-the-Loop
Streaming
Async Support
Type Safe
Short-Term Memory
Long-Term Memory
Shared Memory
Plugin System
Custom Tools
MCP Protocol
A2A Protocol
Code Execution
Web Browsing
File System Access
Sandboxing
Guardrails
Structured Output
DAG Workflows
Visual Builder
CLI
API Server
Self-Hosted
Cloud Hosted
Community Feedback
Strengths
- Git-first philosophy (every edit is a commit)
- Massive model support (100+ LLMs)
- 4x productivity reported by users
- Strong community
- Works with existing codebases
Weaknesses
- ~@@AGENT_PROS_CONS@@.70/command costs
- No formal security certifications
- Single-session only
- No native MCP support
- Terminal-only
Aider Details
| Organization | Aider AI (Paul Gauthier) |
| Organization Type | Individual |
| Funding | Open source only |
| Category | Ready-to-Use |
| Subcategory | Code generation |
| Deployment | Self-Hosted |
| Primary Language | Python |
| Runtime | Python 3.10+ |
| License | Apache-2.0 |
| Commercial Use | Permissive |
| Install Command | pip install aider-chat |
| GitHub Stars | 42,330 |
| GitHub Forks | 4,060 |
| Release Cadence | Weekly |
| Maturity | Mature |
| Pricing Model | Free |
| Free Tier | Fully open-source Apache-2.0 |
| Self-Hosted Free | Yes |
| Cost Model | free + LLM costs (~@@AGENT_INFO_TABLE@@.70/command) |
| Community Size | Very large (42k stars) |
| Community Activity | Very active |
| Sentiment | Very positive |
| GPU Required | No |
| Confidence | High |
| Research Date | 2026-03-24 |
| LLM Providers | GPT-5, Claude 4, Gemini 2.5, DeepSeek R1, Grok-4, local models |
| API Keys Required | LLM provider API key |
Use Cases
- AI-assisted code editing
- Git-integrated pair programming
- Codebase refactoring with AI
- Multi-model code generation
Similar Tools
Claude CodeAider git-first/model-agnostic, Claude Code MCP-rich/Claude-only
OpenAI Codex CLIAider open-source/model-agnostic, Codex OpenAI-specific
When to Use
Best for: Developers wanting git-integrated AI pair programming with any LLM
Avoid when: Need rich plugin/extension ecosystem or visual IDE
Original data from HuggingFace, OpenCompass and various public git repos.
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Release v20260324