← Speech-to-Text

OpenAI

GPT Transcribe

Measured 2026-07-03

WER · batch

2.5%

WER · stream

-

WER · conversational

15.1%

95% CI 9.7–19.9 · n=99

Deletion-heavy: 6.7% deletions against 7.7% substitutions, at 94.5% coverage — it drops words rather than mishearing them. Hallucinated a tail on one clip (edacc-0070, “…we can do it. Hello, hello.”). Best on Indian English at 11.0% and worst on Southern British at 23.9%.

Finalize

-

Time to first token

-

Cost / min

$0.0045

Billed per minute, not per token.

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