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