STACKQUADRANT

Aider

AI Coding Agentfree

Open-source AI pair programming tool for the terminal. Supports multiple LLMs and excels at multi-file editing with git integration.

Open SourceWebsiteDocsGitHub (27.0K)Compare →Changelog (1)Last evaluated: Sep 25, 2026
7.5/10
Weighted average across all evaluation dimensions. Scores are based on benchmark testing, expert review, and community feedback.
Capability Profile
Code GenerationQuality and accuracy of generated code, including correctness, completeness, and adherence to best practices.
Context UnderstandingAbility to comprehend project structure, dependencies, and codebase-wide context for accurate assistance.
Developer ExperienceEase of use, IDE integration quality, onboarding speed, and workflow friction reduction.
Multi-file EditingCapability to make coordinated changes across multiple files while maintaining consistency.
Debugging & FixingEffectiveness at identifying bugs, suggesting fixes, and resolving errors in existing code.
Ecosystem IntegrationSupport for various languages, frameworks, package managers, and development tools.
Score Trend
7.9 → 7.5▼0.4
Score Changes
Code Generation8.5 → 8.2 ▼0.3
Sep 25, 2026Frozen since Feb 2026, no updates
Context Understanding7.8 → 7.6 ▼0.2
Sep 25, 2026No context improvements shipped
Developer Experience7.2 → 6.5 ▼0.7
Sep 25, 2026Maintainer inactive since Oct 2025, community fork emerged
Multi-file Editing8.6 → 8.3 ▼0.3
Sep 25, 2026Unimproved relative to accelerating field
Debugging & Fixing7.8 → 7.4 ▼0.4
Sep 25, 2026No debugging improvements found
Ecosystem Integration7.5 → 6.7 ▼0.8
Sep 25, 2026Overtaken by OpenCode; no new model/MCP support
Pricing & Licensing
Pricing
Free and open source (BYOK for LLM API)
License
Apache-2.0
Community
Developers
50K+ users
GitHub Stars
27,000
Benchmark Results
Multi-file Refactoring Challenge
Time: 5.5
Completion: 92
Code Quality: 8.5
Tests Passing: 45
Context Window Stress Test
Time: 7.5
Broken Imports: 2
Compiles Clean: 0
Changes Correct: 3
Features
terminalopen-sourceclimulti-filegit-integrated
Dimension Scores
8-105-7.9<5
How we score →
Code GenerationQuality and accuracy of generated code, including correctness, completeness, and adherence to best practices.Weight: 100%
8.2

No functional regressions, but no new-model or capability work landed either -- frozen at its Feb 2026 baseline.

Context UnderstandingAbility to comprehend project structure, dependencies, and codebase-wide context for accurate assistance.Weight: 100%
7.6

Frozen since last commit to main (May 22 2026); no context-handling improvements.

Developer ExperienceEase of use, IDE integration quality, onboarding speed, and workflow friction reduction.Weight: 100%
6.5

Maintainer inactive since ~Oct 2025; ~500 open PRs unmerged as of Sep 2026; a community fork (cecli) has become the actively maintained alternative.

Multi-file EditingCapability to make coordinated changes across multiple files while maintaining consistency.Weight: 90%
8.3

Core multi-file editing still solid but unimproved since Feb 2026.

Debugging & FixingEffectiveness at identifying bugs, suggesting fixes, and resolving errors in existing code.Weight: 90%
7.4

No debugging-workflow improvements found in the review window.

Ecosystem IntegrationSupport for various languages, frameworks, package managers, and development tools.Weight: 80%
6.7

No new model/MCP integrations while OpenCode (209K stars) decisively overtook Aider (49K stars) as the leading open-source terminal agent.

Stack Appearances
The Open Source Stack7.8
Role: Terminal-based coding and multi-file refactoring
Stay Updated

Get notified when Aider's scores are updated.