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Claude Agent SDK
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TaglineAnthropic's SDK for building your own agents on Claude.Run any open-source AI model with an API call.AI search done right. Cited answers, not chat theater.Spreadsheets with AI + live integrations baked in.
CategoryAgentsDev PlatformResearchData
PricingAPI usage + SDK is freePay per second of computeFree + $20/mo ProFree + $19-$89/user/mo
Best forDevelopers building custom agents for their own company/product.Developers using open-source models (Flux, SDXL, Whisper, etc).Replacing Google for any question where you want a cited answer in seconds.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Developer-only
  • You build the UI
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictS-tier for builders. The right primitives. What Kai is built on under the hood.S-tier for open-source model APIs. The default in this space.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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