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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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Lex
A
Cursor
S
Sora
A
Groq
S
TaglineGoogle Docs with an AI collaborator baked in.VS Code fork that made AI coding actually work.OpenAI's video model. Long clips, cinematic quality.The fastest AI inference in the world. Crazy low latency.
CategoryWritingCodingVideoDev Platform
PricingFree + $12/moFree + $20/mo Pro + $40/mo BusinessIncluded with ChatGPT Plus/ProFree tier + pay-as-you-go API
Best forEssays, long-form drafts, thinking on the page.Developers. Non-developers who want to ship working code.ChatGPT subscribers experimenting with cinematic shots.Developers who need sub-100ms LLM responses.
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
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
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. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.S-tier for speed. When latency is the product, start here.
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