Contact center calls | Smallest AI Docs

Real-World Contact Center Calls (English & Hindi)

WER and Character Error Rate (CER) on live, dual-channel contact center call recordings (agent and customer channels scored separately), covering English and Hindi. Diarization was applied first to cleanly separate agent and customer speech before scoring. Lower is better.

Evaluated on real-world telephony call audio. Numbers from internal evaluation.

English

STT Model	WER %	CER %
Smallest Pulse	11.47	8.18
Sarvam Saaras v4	12.18	9.20
Deepgram Nova 3	15.80	10.99
Soniox v5	16.26	11.64

Hindi

STT Model	WER %	CER %
Smallest Pulse	10.20	6.74
Sarvam Saaras v4	12.04	8.78
Deepgram Nova 3	13.07	10.35
Soniox v5	15.82	12.45

Pulse leads across both languages on real production call audio, extending its edge on Hindi CER in particular.