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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
HeyGen
S
Groq
S
Perplexity
S
TaglinePrompt to deployed full-stack app in the browser.AI avatar videos. Record once, speak any language.The fastest AI inference in the world. Crazy low latency.AI search done right. Cited answers, not chat theater.
CategoryCodingVideoDev PlatformResearch
PricingFree + $20-$200/moFree + $24-$65/moFree tier + pay-as-you-go APIFree + $20/mo Pro
Best forPMs, founders, non-devs shipping MVPs.Course creators, multilingual marketers, anyone scaling video content.Developers who need sub-100ms LLM responses.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-tier. Best for fast prototypes. Competitive with Lovable — try both.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.S-tier for speed. When latency is the product, start here.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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