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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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Qwen
A
Claude Code
S
Lex
A
TaglineAlibaba's open chat model. Multilingual + agentic.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Google Docs with an AI collaborator baked in.
CategoryChatbotsCodingWriting
PricingFree web + APIPart of Claude Pro/Max/Team plansFree + $12/mo
Best forVietnamese/Chinese content, SEA multilingual use, developers wanting open-weight tool-use.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Essays, long-form drafts, thinking on the page.
Strengths
  • Excellent Chinese + Vietnamese + SEA languages
  • Strong at tool-use + agentic workflows
  • Open weights (Qwen2.5, Qwen3)
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
Weaknesses
  • English quality behind Claude/GPT
  • Less well-known outside Asia
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
Kai's verdictA-tier. The best open model for Vietnamese + Chinese. Don't sleep on it if you work in SEA.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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