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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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DeepSeek
S
Qwen
A
GitHub Copilot
B
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.Alibaba's open chat model. Multilingual + agentic.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.
Categorychatchatcoding
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Free web + APIFree (limited) + $10/mo Pro + $19/mo Business
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.Vietnamese/Chinese content, SEA multilingual use, developers wanting open-weight tool-use.Teams with GitHub already. Devs who don't want to change IDEs.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Excellent Chinese + Vietnamese + SEA languages
  • Strong at tool-use + agentic workflows
  • Open weights (Qwen2.5, Qwen3)
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • English quality behind Claude/GPT
  • Less well-known outside Asia
  • Less agentic than Cursor/Claude Code
  • Model quality varies
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.A-tier. The best open model for Vietnamese + Chinese. Don't sleep on it if you work in SEA.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.
LinkOpen →Open →Open →