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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
Lex
A
Suno
S
Perplexity
S
TaglineOpenAI's video model. Long clips, cinematic quality.Google Docs with an AI collaborator baked in.Prompt to full song with vocals, instruments, the works.AI search done right. Cited answers, not chat theater.
CategoryVideoWritingAudioResearch
PricingIncluded with ChatGPT Plus/ProFree + $12/moFree + $10/mo + $30/moFree + $20/mo Pro
Best forChatGPT subscribers experimenting with cinematic shots.Essays, long-form drafts, thinking on the page.Jingles, intros, demos, sketches, personal use.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Copyright gray zone
  • Audio quality behind studio
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier in its category. The first AI music tool I'd actually listen to.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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