Most agentic AI governance frameworks define the rules but never enforce them. Learn how the API routing layer stops runaway spend and model escalation.
Anthropic restricted Claude Fable 5 just days after launch. If your code hard-codes a model slug, that becomes your outage too. Presets move model choice to the server so you can swap models, set fallbacks, and enforce a data policy without redeploying.
Provider failover is on by default. Model fallbacks are opt-in. The two layers recover from different failures; here's how each one works and where failover stops.
OpenRouter routes every request across 70+ providers, and you control how: provider order, price ceilings, and the fallback chain. Here's how each routing layer works.
Hermes Agent has pushed over 17 trillion tokens through OpenRouter. Here's how to set it up, pick a model that clears the 64K context bar, and tune routing for cost and reliability.