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Claude Agent SDK
S
Perplexity
S
Manus
S
ChatGPT Operator
B
TaglineAnthropic's SDK for building your own agents on Claude.AI search done right. Cited answers, not chat theater.Autonomous AI agent that actually finishes tasks.OpenAI's browser agent. Clicks and types on websites for you.
CategoryAgentsResearchAgentsAgents
PricingAPI usage + SDK is freeFree + $20/mo ProFree tier + $39-$199/moIncluded with ChatGPT Pro $200/mo
Best forDevelopers building custom agents for their own company/product.Replacing Google for any question where you want a cited answer in seconds.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.Power users willing to pay $200/mo for a browser bot.
Strengths
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
Weaknesses
  • Developer-only
  • You build the UI
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
Kai's verdictS-tier for builders. The right primitives. What Kai is built on under the hood.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier in the agent category. The first one I'd give to a non-technical friend.B-tier. Still early. Manus is more flexible for less money.
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