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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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TaglineRun any open-source AI model with an API call.Autonomous AI agent that actually finishes tasks.VS Code fork that made AI coding actually work.The one that actually gets text in images right.
Categorydev platformagentscodingimage
PricingPay per second of computeFree tier + $39-$199/moFree + $20/mo Pro + $40/mo BusinessFree + $8/mo + $20/mo + $60/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).People who want to hand off tasks entirely — trip planning, research, spreadsheet building.Developers. Non-developers who want to ship working code.Anything with text — posters, ads, album covers, slide decks.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Best text rendering in the game
  • Strong free tier
  • Good for logos, posters, thumbnails
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Aesthetic ceiling below Midjourney
  • Less style variety
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier in the agent category. The first one I'd give to a non-technical friend.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for text-in-image. Use this for posters, Midjourney for art.
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