HTTP 429
rate_limit_exceededAPI quota exceeded
Too many API requests were sent in a short period.
Resolution
Retry after the reported delay and reduce request concurrency.
Response handling
Keep the response's request_id for diagnostics. Retry only transient 429 and 503 responses, using the rate-limit headers and exponential backoff with jitter. Correct 400, 401, and 403 requests before retrying.