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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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Dev Platform
Agents
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Video
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Meetings
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Productivity
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Lex
A
Cursor
S
Kling
A
Suno
S
TaglineGoogle Docs with an AI collaborator baked in.VS Code fork that made AI coding actually work.Kuaishou's video model. The surprise standout.Prompt to full song with vocals, instruments, the works.
CategoryWritingCodingVideoAudio
PricingFree + $12/moFree + $20/mo Pro + $40/mo BusinessCredit-based, free trialFree + $10/mo + $30/mo
Best forEssays, long-form drafts, thinking on the page.Developers. Non-developers who want to ship working code.Anyone who wants top-tier video quality for less.Jingles, intros, demos, sketches, personal use.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • UX is rough for English speakers
  • Queue times
  • Copyright gray zone
  • Audio quality behind studio
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.S-tier in its category. The first AI music tool I'd actually listen to.
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