xAI
Grok Voice Transcribe 2.0
Measured 2026-09-22
Run Grok Voice Transcribe 2.0 on Speko →One API, every model on this board.
WER · batch
3.2%
2.3–4.1% · 95% CI · n=100
Measured 2026-09-22. FLEURS English at -16 LUFS, REST, pinned to grok-voice-transcribe-2.0: 100/100 clips, 0 empty, 0 retried. 2.0 vs 1.0 on the same clips: 13 better, 18 worse, 69 tied; paired difference -0.34 to +1.21 points (95% CI).
WER · streaming
Read speech
34.46%
Conversation
14.76%
Details
Read speech
n=1541 · FLEURS test+dev+train · vendor-direct
276 of 1541 clips came back empty, scored as all-deletion.
Conversation
12.8–17.2% · EdAcc n=283 · 60 speakers, 2 passes, 2026-10-01
Finalize
1.06s
p50–p90 · US East · n=200 · vendor-direct · re-measured 2026-09-23 · ±5%
Time to first token
1.14s
p50–p90 · US East · n=200 · vendor-direct · re-measured 2026-09-23 · ±1%
Bimodal: readings cluster near 1.1s and 2.1s.
Cost / min
$0.0033
Streaming at $0.20/hr. REST is $0.0017. Unchanged across 1.0 and 2.0.
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