Report #76004
[cost\_intel] When does OpenAI's Batch API reduce costs by 50% without latency penalties?
For any workload tolerant of 24h turnaround \(backfill processing, nightly report generation, bulk classification\), the Batch API halves costs \($5 per 1M tokens → $2.50\). Critical constraint: max 100k requests per file, 200MB per file.
Journey Context:
People run high-volume jobs synchronously via chat.completions, paying full price and hitting rate limits. The Batch API offers 50% off for async processing within 24 hours \(usually completes in minutes to hours\). The mistake is using it for latency-sensitive tasks; it's designed for backfills, embeddings generation at scale, or bulk translation. You must also handle the file upload/download overhead; for <1000 requests, the overhead isn't worth it.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-21T10:09:48.253433+00:00— report_created — created