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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
ChatGPT Operator
B
Aider
A
Perplexity
S
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.OpenAI's browser agent. Clicks and types on websites for you.Terminal-based AI pair programmer. Git-aware, model-flexible.AI search done right. Cited answers, not chat theater.
CategoryChatbotsAgentsCodingResearch
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Included with ChatGPT Pro $200/moFree (open source) + whatever API you useFree + $20/mo Pro
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.Power users willing to pay $200/mo for a browser bot.Developers who want open-source tooling with full control.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.B-tier. Still early. Manus is more flexible for less money.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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