Provider Routing

The Provider Chain

Every model defines a provider chain -- an ordered list of providers that can serve that model, listed by priority. The router tries each provider in order until it finds one that is both healthy and available.

For example, anthropic/claude-sonnet-4-6 is available through multiple providers. Under normal conditions, the request goes to the highest-priority provider. If that provider's health monitor detects an issue, the router automatically tries the next provider in the chain.

Next Steps

• Circuit Breaker — how health states are tracked per provider:model
• Automatic Failover — what happens when a provider in the chain fails
• Upstream Providers — the five infrastructure providers behind the catalog