Step-Audio 2 Technical Report

Benchmark Model Rank Results
audio-understanding-reasoning-on-mmauStep-Audio-2Accuracy (Avg, Test-mini): 77.58
audio-understanding-reasoning-on-mmauStep-Audio-2-mini (8.3B)Accuracy (Avg, Test-mini): 72.73
speech-recognition-on-common-voice-englishStep-Audio 2 mini#1Test WER: 6.76
speech-recognition-on-common-voice-englishKimi-Audio#3Test WER: 7.83
speech-recognition-on-common-voice-englishDoubao LLM ASRTest WER: 9.20
speech-recognition-on-common-voice-englishGPT-4o TranscribeTest WER: 9.30
speech-recognition-on-common-voice-englishQwen OmniTest WER: 8.33
speech-recognition-on-common-voice-englishStep-Audio 2Test WER: 5.95
speech-recognition-on-librispeech-test-cleanStep-Audio 2 mini#20Word Error Rate (WER): 1.33
speech-recognition-on-librispeech-test-cleanDoubao LLM ASRWord Error Rate (WER): 2.92
speech-recognition-on-librispeech-test-cleanGPT-4o TranscribeWord Error Rate (WER): 1.75
speech-recognition-on-librispeech-test-cleanQwen OmniWord Error Rate (WER): 2.93
speech-recognition-on-librispeech-test-cleanStep-Audio 2Word Error Rate (WER): 1.17
speech-recognition-on-librispeech-test-otherStep-Audio 2 mini#21Word Error Rate (WER): 2.86
speech-recognition-on-librispeech-test-otherDoubao LLM ASRWord Error Rate (WER): 5.32
speech-recognition-on-librispeech-test-otherGPT-4o TranscribeWord Error Rate (WER): 4.23
speech-recognition-on-librispeech-test-otherQwen OmniWord Error Rate (WER): 5.07
speech-recognition-on-librispeech-test-otherStep-Audio 2Word Error Rate (WER): 2.42