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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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S
Google Veo
A
Grammarly
A
TaglineRun any open-source AI model with an API call.Google's video model. Baked into Gemini + YouTube Shorts.Grammar check + tone + AI drafting, everywhere you type.
Categorydev platformvideowriting
PricingPay per second of computeIncluded with Gemini Advanced $20/mo + YouTube creator toolsFree + $12-$15/mo Premium + team plans
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Gemini Advanced users, YouTube Shorts creators.Non-native English writers, business email, anyone who types a lot.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Included with Gemini Advanced
  • YouTube Shorts native integration
  • Strong prompt understanding
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Still catching up on quality vs Kling/Runway
  • Less control than pros need
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier if you already pay Gemini. B-tier standalone.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
LinkOpen →Open →Open →