Quick checklist: enable Zapier task history + detailed logs; add idempotency keys to CMS requests; validate/sanitize payloads and strip unsupported chars; implement retries only for 429/5xx with exponential backoff + full jitter (e.g., base 500ms, x2, cap 30s); use a dead-letter queue for failed items and a circuit-breaker to avoid flapping; limit concurrency or batch writes to avoid rate limits; persist model response IDs and raw payloads for repro.

If helpful, see ChatGPT comparison page: Compare ChatGPT and Gemini