Open ASR · AMI-Cleaned WER ↗English short-form; normalization unversioned
11.1% WERespnet/owsm_ctc_v4_1B
espnetDiscovered Oct 17, 2026
espnet/owsm_ctc_v4_1B
1B parameters · 75 languages · Encoder: Whisper · Decoder: CTC
Measured performance
All leaderboards ↗Benchmark results
Word error rate · lower is better
Open ASR · Earnings22-Cleaned-AA-chunked WER ↗English short-form; normalization unversioned
10.31% WERespnet/owsm_ctc_v4_1B
Open ASR · Gigaspeech-Cleaned WER ↗English short-form; normalization unversioned
9.29% WERespnet/owsm_ctc_v4_1B
Open ASR · LS Clean WER ↗English short-form; normalization unversioned
2.11% WERespnet/owsm_ctc_v4_1B
Open ASR · LS Other WER ↗English short-form; normalization unversioned
4.38% WERespnet/owsm_ctc_v4_1B
Open ASR · SPGISpeech WER ↗English short-form; normalization unversioned
2.31% WERespnet/owsm_ctc_v4_1B
Open ASR · URGENT2024 WER ↗English short-form; normalization unversioned
16.12% WERespnet/owsm_ctc_v4_1B
Open ASR · Voice Arena Monsoon WER ↗English short-form; normalization unversioned
6.66% WERespnet/owsm_ctc_v4_1B
Open ASR · Voxpopuli-AA-Cleaned WER ↗English short-form; normalization unversioned
4.09% WERespnet/owsm_ctc_v4_1B
Access & cost
0 quotesPrices across providers
No listed provider price
Model specifications
- Developer
- espnet
- Modality
- Audio
- Context
- Not reported
- Maximum output
- Not reported
- Weights
- Not reported
- First discovered
- Oct 17, 2026