← Speech-to-Text 
OpenAI
GPT-4o Transcribe
Measured 2026-07-03
WER · batch
2.3%
WER · stream
5.8%
WER · conversational
31.9%
Emits roughly one sentence and stops: 24.0% of its 31.9% is pure deletion against only 6.7% substitution, so it hears fine and quits early. Confirmed against the vendor API directly, none of our code in the path.
Finalize
572ms
p50–p90 · us-east4 · n=30
Time to first token
5.06s
p50–p90 · us-east4
Cost / min
$0.006
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