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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
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S
DALL-E 3
B
OpenRouter
S
TaglineRun any open-source AI model with an API call.Vector + raster AI for designers. Actually controls the output.OpenAI's image model. Built into ChatGPT Plus.One API, every model. Pay-as-you-go, no subscriptions.
CategoryDev PlatformImageImageDev Platform
PricingPay per second of computeFree + $12-$48/moIncluded with ChatGPT Plus $20/moPay per token — model-dependent
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Designers, brand teams, anyone needing vector output or tight style control.ChatGPT Plus users who want images without paying extra.Developers experimenting across models. Apps that want fallback logic.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Exports SVG vectors — rare in AI image gen
  • Strong style control + consistency
  • Brand kit for consistent outputs
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Less hyped than Midjourney
  • Learning curve for non-designers
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Slight markup over direct API
  • Some provider features not exposed
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for designers. The only one that takes vectors seriously.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.S-tier for model-shopping. I use this for every prototype before committing.
LinkOpen →Open →Open →Open →