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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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S
Perplexity
S
Bolt.new (StackBlitz)
A
Elicit
S
TaglineAutonomous AI agent that actually finishes tasks.AI search done right. Cited answers, not chat theater.Prompt to deployed full-stack app in the browser.AI research assistant for academic literature.
CategoryAgentsResearchCodingResearch
PricingFree tier + $39-$199/moFree + $20/mo ProFree + $20-$200/moFree + $12-$42/mo
Best forPeople who want to hand off tasks entirely — trip planning, research, spreadsheet building.Replacing Google for any question where you want a cited answer in seconds.PMs, founders, non-devs shipping MVPs.Grad students, researchers, anyone doing literature reviews.
Strengths
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
Weaknesses
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Academic-only
  • Can hallucinate citations — verify everything
Kai's verdictS-tier in the agent category. The first one I'd give to a non-technical friend.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. Best for fast prototypes. Competitive with Lovable — try both.S-tier for academic research. Nothing else comes close for systematic reviews.
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