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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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Devin
A
Le Chat (Mistral)
B
Google Veo
A
Aider
A
TaglineCognition Labs' autonomous coding engineer.French alternative. Fast, European, privacy-focused.Google's video model. Baked into Gemini + YouTube Shorts.Terminal-based AI pair programmer. Git-aware, model-flexible.
CategoryAgentsChatbotsVideoCoding
Pricing$500/moFree + $15/mo ProIncluded with Gemini Advanced $20/mo + YouTube creator toolsFree (open source) + whatever API you use
Best forEngineering teams offloading tickets. Ops/platform work.European users with data residency needs. Fans of open-weight models.Gemini Advanced users, YouTube Shorts creators.Developers who want open-source tooling with full control.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • European data residency
  • Very fast responses
  • Open-weight Mistral models available
  • Good French/European languages
  • Included with Gemini Advanced
  • YouTube Shorts native integration
  • Strong prompt understanding
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Smaller capability gap vs frontier models
  • Less polished UX
  • Still catching up on quality vs Kling/Runway
  • Less control than pros need
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.B-tier overall, A-tier if GDPR/data residency matters. Solid backup option.A-tier if you already pay Gemini. B-tier standalone.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
LinkOpen →Open →Open →Open →