Aider
According to AI Tier List, Aider is rated Tier A for Coding & Development. How we rank →
Open-source CLI coding assistant
Aider is an open-source CLI coding tool with 38,500+ GitHub stars. Achieves 83% on Aider Polyglot benchmark with o3-high + GPT-4.1 architect mode. Maximum flexibility with any API key.
Best For
Tier Reason
Leading open-source solution. Model flexibility allows 70%+ benchmark performance under $1 with DeepSeek. Maximum customization.
Strengths
Completely free and open-source, all model support (Ollama/DeepSeek/Claude/GPT), architect mode, active community
Weaknesses
CLI-only with no GUI, complex setup, separate API costs, steep learning curve for beginners
Recent Changes
Surpassed 38,500+ GitHub stars, achieved 83% on Polyglot with o3-high + GPT-4.1 architect mode
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