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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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A
TaglineRun any open-source AI model with an API call.The one that actually gets text in images right.The fastest AI inference in the world. Crazy low latency.Google Docs with an AI collaborator baked in.
CategoryDev PlatformImageDev PlatformWriting
PricingPay per second of computeFree + $8/mo + $20/mo + $60/moFree tier + pay-as-you-go APIFree + $12/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Anything with text — posters, ads, album covers, slide decks.Developers who need sub-100ms LLM responses.Essays, long-form drafts, thinking on the page.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Best text rendering in the game
  • Strong free tier
  • Good for logos, posters, thumbnails
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Aesthetic ceiling below Midjourney
  • Less style variety
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for text-in-image. Use this for posters, Midjourney for art.S-tier for speed. When latency is the product, start here.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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