A technically available fallback can still be unacceptable for capability, safety or region reasons.
GATEWAY & ROUTINGADVANCED LLMOPS
Fallback Policy
Fallback policy defines what happens when the preferred route is unavailable, too slow or out of quota.
The gateway falls back only for tasks whose acceptance tests pass on the secondary model.
Which request classes may degrade and which must fail closed?
REMEMBERFallback must preserve the task contract.
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