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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Aider
A
Claude Code
S
Gemini
A
Le Chat (Mistral)
B
TaglineTerminal-based AI pair programmer. Git-aware, model-flexible.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Google's answer. Best integrated with Workspace + free for a lot.French alternative. Fast, European, privacy-focused.
CategoryCodingCodingChatbotsChatbots
PricingFree (open source) + whatever API you usePart of Claude Pro/Max/Team plansFree + $20/mo Advanced (bundled with 2TB Drive)Free + $15/mo Pro
Best forDevelopers who want open-source tooling with full control.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Anyone already on Google, research tasks, summarizing long documents.European users with data residency needs. Fans of open-weight models.
Strengths
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • European data residency
  • Very fast responses
  • Open-weight Mistral models available
  • Good French/European languages
Weaknesses
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Smaller capability gap vs frontier models
  • Less polished UX
Kai's verdictA-tier. The right answer if you want open-source + terminal-native + model-agnostic.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.B-tier overall, A-tier if GDPR/data residency matters. Solid backup option.
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