Cross-meeting speaker attribution: ThyVoice leads all evaluated commercial cascades at a 47.13 mean SI-cpWER, while per-meeting leader ElevenLabs gains about 30 percentage points of attribution error on CHiME-6
The work introduces SI-cpWER, a metric that scores cpWER under one corpus-global speaker-ID map, and evaluates five commercial diarize-then-identify cascades, two open baselines, and the end-to-end reference system ThyVoice on CHiME-8 NOTSOFAR (clean and noise-augmented) plus CHiME-6, finding that requiring one persistent identity across meetings changes the commercial ranking: ThyVoice records lower SI-cpWER than every evaluated commercial cascade in all three conditions, with a full-panel mean of 47.13 versus 54.75 for the next system.