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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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Genspark
A
Claude Code
S
Perplexity
S
Claude Agent SDK
S
TaglineAI agent for deep search. Generates Sparkpages — full mini-reports.Anthropic's CLI agent. Opus-powered, operates on your repo directly.AI search done right. Cited answers, not chat theater.Anthropic's SDK for building your own agents on Claude.
CategoryResearchCodingResearchAgents
PricingFree + $25/mo PlusPart of Claude Pro/Max/Team plansFree + $20/mo ProAPI usage + SDK is free
Best forTravel planning, shopping comparisons, deep research where you want an artifact back.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Replacing Google for any question where you want a cited answer in seconds.Developers building custom agents for their own company/product.
Strengths
  • Sparkpages = curated multi-source mini-articles
  • Agent can book, compare, shop
  • Autopilot agent for long tasks
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step 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
Weaknesses
  • Early-stage — rough edges
  • Less reliable than Perplexity for simple questions
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Developer-only
  • You build the UI
Kai's verdictA-tier. Bet on this one — the Sparkpage format is genuinely new.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.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.
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