HTTP status
400 invalid_request_error
Typical cause
The requested model is available under a premium pricing tier (e.g., Anthropic fast mode at 6x cost). To prevent accidental cost escalation, these offerings require explicit opt-in. Note: Auriko’s “priority” tier refers to Anthropic Fast Mode (2.5x speed), not Anthropic’s separate Priority Tier (committed capacity SLA).Resolution
Setgateway.routing.tier to "priority" in your request to opt in to premium-tier routing.