Direct answer
Answer
V2 applies rate and concurrency limits; respect HTTP 429 and Retry-After. Every repeated prediction is a new operation with normal billing. Do not automatically retry a timeout, lost response or unconfirmed billing outcome. Inspect code, action and meta.usage.billing_status first; contact support with request_id for billing_reconciliation_required. Use bounded backoff only when billing is confirmed and the documented action permits a new attempt.
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