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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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Bolt.new (StackBlitz)
A
Cursor
S
Perplexity
S
Claude Agent SDK
S
TaglinePrompt to deployed full-stack app in the browser.VS Code fork that made AI coding actually work.AI search done right. Cited answers, not chat theater.Anthropic's SDK for building your own agents on Claude.
CategoryCodingCodingResearchAgents
PricingFree + $20-$200/moFree + $20/mo Pro + $40/mo BusinessFree + $20/mo ProAPI usage + SDK is free
Best forPMs, founders, non-devs shipping MVPs.Developers. Non-developers who want to ship working code.Replacing Google for any question where you want a cited answer in seconds.Developers building custom agents for their own company/product.
Strengths
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • 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
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Developer-only
  • You build the UI
Kai's verdictA-tier. Best for fast prototypes. Competitive with Lovable — try both.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.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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