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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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Chatbots
Research
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Image
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Productivity
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Agents
Dev Platform
Data
Marketing
Education
Perplexity
S
Sora
A
Elicit
S
HeyGen
S
TaglineAI search done right. Cited answers, not chat theater.OpenAI's video model. Long clips, cinematic quality.AI research assistant for academic literature.AI avatar videos. Record once, speak any language.
CategoryResearchVideoResearchVideo
PricingFree + $20/mo ProIncluded with ChatGPT Plus/ProFree + $12-$42/moFree + $24-$65/mo
Best forReplacing Google for any question where you want a cited answer in seconds.ChatGPT subscribers experimenting with cinematic shots.Grad students, researchers, anyone doing literature reviews.Course creators, multilingual marketers, anyone scaling video content.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Academic-only
  • Can hallucinate citations — verify everything
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.S-tier for academic research. Nothing else comes close for systematic reviews.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.
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