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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.One API, every model. Pay-as-you-go, no subscriptions.VS Code fork that made AI coding actually work.Enterprise-grade TTS with voice cloning.
CategoryDev PlatformDev PlatformCodingVoice
PricingPay per second of computePay per token — model-dependentFree + $20/mo Pro + $40/mo BusinessFree + $39-$99/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers experimenting across models. Apps that want fallback logic.Developers. Non-developers who want to ship working code.Podcasters + enterprises where cost matters.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Strong API + enterprise features
  • Good voice variety
  • Lower cost than ElevenLabs at scale
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Slight markup over direct API
  • Some provider features not exposed
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Voice realism slightly behind ElevenLabs
  • UX less polished
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for model-shopping. I use this for every prototype before committing.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. Great price/performance. Go here if ElevenLabs is too expensive.
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