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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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Sora
A
Perplexity
S
Kling
A
Lex
A
TaglineOpenAI's video model. Long clips, cinematic quality.AI search done right. Cited answers, not chat theater.Kuaishou's video model. The surprise standout.Google Docs with an AI collaborator baked in.
CategoryVideoResearchVideoWriting
PricingIncluded with ChatGPT Plus/ProFree + $20/mo ProCredit-based, free trialFree + $12/mo
Best forChatGPT subscribers experimenting with cinematic shots.Replacing Google for any question where you want a cited answer in seconds.Anyone who wants top-tier video quality for less.Essays, long-form drafts, thinking on the page.
Strengths
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
Weaknesses
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • UX is rough for English speakers
  • Queue times
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
Kai's verdictA-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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