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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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Claude
S
Rows
A
Devin
A
TaglineAI search done right. Cited answers, not chat theater.Anthropic's flagship — best reasoning + longest useful context.Spreadsheets with AI + live integrations baked in.Cognition Labs' autonomous coding engineer.
CategoryResearchChatbotsDataAgents
PricingFree + $20/mo ProFree + $20/mo Pro + team/enterpriseFree + $19-$89/user/mo$500/mo
Best forReplacing Google for any question where you want a cited answer in seconds.Long writing, code, careful thinking, documents over 50 pages.Ops teams, marketers, anyone building dashboards from multiple sources.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Image generation is weak
  • No native web search on all tiers
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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