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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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DeepSeek
S
Cursor
S
Elicit
S
ChatGPT Operator
B
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.VS Code fork that made AI coding actually work.AI research assistant for academic literature.OpenAI's browser agent. Clicks and types on websites for you.
CategoryChatbotsCodingResearchAgents
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Free + $20/mo Pro + $40/mo BusinessFree + $12-$42/moIncluded with ChatGPT Pro $200/mo
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.Developers. Non-developers who want to ship working code.Grad students, researchers, anyone doing literature reviews.Power users willing to pay $200/mo for a browser bot.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Academic-only
  • Can hallucinate citations — verify everything
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for academic research. Nothing else comes close for systematic reviews.B-tier. Still early. Manus is more flexible for less money.
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