Buildathons.ai

OpenRouter & API Aggregators Course

Access 200+ LLMs with a single API key. Implement model fallbacks, cost routing, and A/B testing using OpenRouter's unified OpenAI-compatible interface.…

Course overview

Access 200+ LLMs with a single API key. Implement model fallbacks, cost routing, and A/B testing using OpenRouter's unified OpenAI-compatible interface.

Why Use an API Aggregator?

Managing multiple AI provider keys, handling rate limits, and switching models becomes complex fast. API aggregators like OpenRouter solve this with: Single API key for 200+ models (OpenAI, Anthropic, Google, Meta, Mistral, etc.) OpenAI-compatible — drop-in replacement, just change the base URL Automatic fallbacks — if one model is down, route to the next Cost tracking — see per-request costs across all providers No markup on most models (pass-through pricing)

Using OpenRouter

OpenRouter uses the same API shape as OpenAI. Just swap the base URL and use any model ID.

Model Routing Strategies

OpenRouter supports smart routing to minimize cost or maximize quality.