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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
Data
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ChatGPT Operator
B
Claude Agent SDK
S
Cursor
S
Groq
S
TaglineOpenAI's browser agent. Clicks and types on websites for you.Anthropic's SDK for building your own agents on Claude.VS Code fork that made AI coding actually work.The fastest AI inference in the world. Crazy low latency.
CategoryAgentsAgentsCodingDev Platform
PricingIncluded with ChatGPT Pro $200/moAPI usage + SDK is freeFree + $20/mo Pro + $40/mo BusinessFree tier + pay-as-you-go API
Best forPower users willing to pay $200/mo for a browser bot.Developers building custom agents for their own company/product.Developers. Non-developers who want to ship working code.Developers who need sub-100ms LLM responses.
Strengths
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Developer-only
  • You build the UI
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
Kai's verdictB-tier. Still early. Manus is more flexible for less money.S-tier for builders. The right primitives. What Kai is built on under the hood.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for speed. When latency is the product, start here.
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