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OpenRouter

S tier

One API, every model. Pay-as-you-go, no subscriptions.

Open OpenRouter →Compare with alternatives

Kai's verdict

S-tier for model-shopping. I use this for every prototype before committing.

Strengths

  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use

Weaknesses

  • Slight markup over direct API
  • Some provider features not exposed

Best for

Developers experimenting across models. Apps that want fallback logic.

Pricing

Pay per token — model-dependent

Alternatives worth knowing

Replicate
S
Run any open-source AI model with an API call.