OpenAI

GPT-4o-mini Transcribe

Measured 2026-07-03

WER · batch

2.7%

WER · stream

6.4%

WER · conversational

18.5%

Finalize

460ms

p50–p90 · us-east4 · n=30

Time to first token

4.98s

p50–p90 · us-east4

Cost / min

$0.003

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