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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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Agents
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Image
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Data
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Devin
A
ChatGPT Operator
B
Groq
S
Claude Agent SDK
S
TaglineCognition Labs' autonomous coding engineer.OpenAI's browser agent. Clicks and types on websites for you.The fastest AI inference in the world. Crazy low latency.Anthropic's SDK for building your own agents on Claude.
CategoryAgentsAgentsDev PlatformAgents
Pricing$500/moIncluded with ChatGPT Pro $200/moFree tier + pay-as-you-go APIAPI usage + SDK is free
Best forEngineering teams offloading tickets. Ops/platform work.Power users willing to pay $200/mo for a browser bot.Developers who need sub-100ms LLM responses.Developers building custom agents for their own company/product.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Developer-only
  • You build the UI
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.B-tier. Still early. Manus is more flexible for less money.S-tier for speed. When latency is the product, start here.S-tier for builders. The right primitives. What Kai is built on under the hood.
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