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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
Qwen
A
Cursor
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TaglineCognition Labs' autonomous coding engineer.Alibaba's open chat model. Multilingual + agentic.VS Code fork that made AI coding actually work.
CategoryAgentsChatbotsCoding
Pricing$500/moFree web + APIFree + $20/mo Pro + $40/mo Business
Best forEngineering teams offloading tickets. Ops/platform work.Vietnamese/Chinese content, SEA multilingual use, developers wanting open-weight tool-use.Developers. Non-developers who want to ship working code.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Excellent Chinese + Vietnamese + SEA languages
  • Strong at tool-use + agentic workflows
  • Open weights (Qwen2.5, Qwen3)
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • English quality behind Claude/GPT
  • Less well-known outside Asia
  • Can feel overwhelming for non-coders
  • Expensive at scale
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. The best open model for Vietnamese + Chinese. Don't sleep on it if you work in SEA.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.
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