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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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ChatGPT Operator
B
Claude Agent SDK
S
Elicit
S
TaglineOpenAI's browser agent. Clicks and types on websites for you.Anthropic's SDK for building your own agents on Claude.AI research assistant for academic literature.
CategoryAgentsAgentsResearch
PricingIncluded with ChatGPT Pro $200/moAPI usage + SDK is freeFree + $12-$42/mo
Best forPower users willing to pay $200/mo for a browser bot.Developers building custom agents for their own company/product.Grad students, researchers, anyone doing literature reviews.
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
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
Weaknesses
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Developer-only
  • You build the UI
  • Academic-only
  • Can hallucinate citations — verify everything
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 academic research. Nothing else comes close for systematic reviews.
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