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Aider
A
Ollama
S
Cursor
S
TaglineTerminal-based AI pair programmer. Git-aware, model-flexible.Run LLMs locally. One-line install, GUI optional.VS Code fork that made AI coding actually work.
Categorycodingdev platformcoding
PricingFree (open source) + whatever API you useFree + open sourceFree + $20/mo Pro + $40/mo Business
Best forDevelopers who want open-source tooling with full control.Devs wanting offline/local LLMs for privacy or experimentation.Developers. Non-developers who want to ship working code.
Strengths
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Run Llama, Mistral, Qwen, etc. on your laptop
  • Simple CLI + API
  • Hardware-aware (picks the right quant)
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
Weaknesses
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Needs beefy laptop for larger models
  • Speed way behind cloud APIs
  • Can feel overwhelming for non-coders
  • Expensive at scale
Kai's verdictA-tier. The right answer if you want open-source + terminal-native + model-agnostic.S-tier for local inference. If you care about privacy or want to tinker, install this today.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.
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