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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
Claude
S
Hume AI
A
TaglineCognition Labs' autonomous coding engineer.Anthropic's flagship — best reasoning + longest useful context.Voice AI that reads + expresses emotion.
CategoryAgentsChatbotsVoice
Pricing$500/moFree + $20/mo Pro + team/enterpriseFree tier + pay-as-you-go
Best forEngineering teams offloading tickets. Ops/platform work.Long writing, code, careful thinking, documents over 50 pages.Therapy apps, customer service, any voice agent where emotion matters.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Image generation is weak
  • No native web search on all tiers
  • Niche use case
  • Pricing ramps fast
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.A-tier in its niche. The only one that actually gets emotion right.
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