← Speech-to-Text
Soniox
stt-rt-v6
Measured 2026-11-02
Build voice agents on Speko →stt-rt-v6 is measured here for comparison — it is not one of the models Speko routes.
WER · batch
—
Streaming-only endpoint
WER · streaming
Read speech
5.4%
Conversation
14.70%
Details
Read speech
n=1541 · FLEURS test+dev+train · vendor-direct
Conversation
12.8–17.1% · EdAcc n=283 · 60 speakers, 2 passes, 2026-11-02
Finalize
315ms
p50–p90 · US East · n=200 · vendor-direct · re-measured 2026-11-03 · ±16%
Measured 2026-11-03
Time to first token
1.91s
p50–p90 · US East · n=200 · vendor-direct · re-measured 2026-11-03 · ±7%
Measured 2026-11-03
Cost / min
$0.002
Vendor list, $0.12 per audio hour. Checked 2026-11-02.
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URL
https://speko.ai/benchmarks/stt/soniox-stt-rt-v6