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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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GitHub Copilot
B
Genspark
A
Claude Agent SDK
S
Perplexity
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.AI agent for deep search. Generates Sparkpages — full mini-reports.Anthropic's SDK for building your own agents on Claude.AI search done right. Cited answers, not chat theater.
CategoryCodingResearchAgentsResearch
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $25/mo PlusAPI usage + SDK is freeFree + $20/mo Pro
Best forTeams with GitHub already. Devs who don't want to change IDEs.Travel planning, shopping comparisons, deep research where you want an artifact back.Developers building custom agents for their own company/product.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Sparkpages = curated multi-source mini-articles
  • Agent can book, compare, shop
  • Autopilot agent for long tasks
  • 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
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Early-stage — rough edges
  • Less reliable than Perplexity for simple questions
  • Developer-only
  • You build the UI
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Bet on this one — the Sparkpage format is genuinely new.S-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.
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