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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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Dev Platform
Agents
Voice
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Research
Coding
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Image
Meetings
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Devin
A
Claude Agent SDK
S
Groq
S
Perplexity
S
TaglineCognition Labs' autonomous coding engineer.Anthropic's SDK for building your own agents on Claude.The fastest AI inference in the world. Crazy low latency.AI search done right. Cited answers, not chat theater.
CategoryAgentsAgentsDev PlatformResearch
Pricing$500/moAPI usage + SDK is freeFree tier + pay-as-you-go APIFree + $20/mo Pro
Best forEngineering teams offloading tickets. Ops/platform work.Developers building custom agents for their own company/product.Developers who need sub-100ms LLM responses.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Developer-only
  • You build the UI
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for builders. The right primitives. What Kai is built on under the hood.S-tier for speed. When latency is the product, start here.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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