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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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Chatbots
Research
Coding
Image
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Meetings
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Agents
Dev Platform
Data
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ChatGPT Operator
B
Perplexity
S
Claude Agent SDK
S
Cursor
S
TaglineOpenAI's browser agent. Clicks and types on websites for you.AI search done right. Cited answers, not chat theater.Anthropic's SDK for building your own agents on Claude.VS Code fork that made AI coding actually work.
CategoryAgentsResearchAgentsCoding
PricingIncluded with ChatGPT Pro $200/moFree + $20/mo ProAPI usage + SDK is freeFree + $20/mo Pro + $40/mo Business
Best forPower users willing to pay $200/mo for a browser bot.Replacing Google for any question where you want a cited answer in seconds.Developers building custom agents for their own company/product.Developers. Non-developers who want to ship working code.
Strengths
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • 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
Weaknesses
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Developer-only
  • You build the UI
  • Can feel overwhelming for non-coders
  • Expensive at scale
Kai's verdictB-tier. Still early. Manus is more flexible for less money.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.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.
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