OpenRouter

Single API for all LLM providers

LLM Utility Free (passthrough pricing)
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What It Is

OpenRouter provides a single API and billing account for 200+ models across all major providers. Automatic failover, pricing comparison, and usage analytics. You bring one API key, they handle routing to whichever provider you pick.

Strengths & Weaknesses

✓ Strengths

  • Single billing account
  • Automatic failover
  • Pricing visibility
  • 200+ models

× Weaknesses

  • Adds 2-5% markup
  • Dependent on third party
  • Rate limits vary by upstream

Best Use Cases

Multi-provider appsModel comparisonQuick prototyping

Alternatives

LiteLLM
Unified interface for 100+ LLM APIs
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