Open-source terminal tool Aider introduced Architect/Editor dual-model pairing. Complex reasoning and architectural decisions are handled by top-tier models (o3-mini / Claude 3.7 Sonnet), while diff editing and file patching are delegated to fast, economical models (DeepSeek-V3 / Qwen-Coder), slashing API costs by 45% while preserving 90%+ solve rates.

Key Takeaways

  • βœ“Reasoning models plan architectures while fast models emit precise file diffs.
  • βœ“Maintains rigorous design logic while reducing overall API billing costs by 45%.
  • βœ“Live in latest Aider release via `--architect` and `--editor` flags.
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