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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
OpenRouter
S
GitHub Copilot
B
DALL-E 3
B
TaglineRun any open-source AI model with an API call.One API, every model. Pay-as-you-go, no subscriptions.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.OpenAI's image model. Built into ChatGPT Plus.
Categorydev platformdev platformcodingimage
PricingPay per second of computePay per token — model-dependentFree (limited) + $10/mo Pro + $19/mo BusinessIncluded with ChatGPT Plus $20/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers experimenting across models. Apps that want fallback logic.Teams with GitHub already. Devs who don't want to change IDEs.ChatGPT Plus users who want images without paying extra.
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
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Slight markup over direct API
  • Some provider features not exposed
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
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.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.
LinkOpen →Open →Open →Open →