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Owsm Ctc v4 1B

Jan 2025
eOwsm Ctc v4 1B
Compare in
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self-host onlyprice
8.6Open ASR
Jan 2025released

Ranking?

Full ranking →
1Granite Speech 5.0 470M Turboctc21,134.32Granite Speech 5.0 470M Turboctc Nc20,801.33Zipformer-cr-ctc-transducer-XL-290M (fast-gpu-asr, transducer_modified_beam_search)19,289.74Niagara 9M Batch.en7,2175Parakeet TDT 0.6B V3, Togetherai6,227.7
···
21Whisper Large v3 Turbo810.522Owsm Ctc v4 1B783.323Qwen 3 ASR 0.6B Hf749.5

Run it yourself

Fits onhardware needs not verified yet
LicenceCC BY 4.0free for commercial use

Benchmarks

in Speech & Voice
Open ASR · average WER8.6#49
Open ASR · RTFx783.3#22
Open ASR · AMI Cleaned WER11.1#42
Open ASR · Earnings-22 Cleaned AA Chunked WER10.3#49
Open ASR · GigaSpeech Cleaned WER9.3#52
Open ASR · LibriSpeech Clean WER2.1#50
Open ASR · LibriSpeech Other WER4.4#47
Open ASR · SPGISpeech WER2.3#24
Open ASR · URGENT 2024 WER16.1#44
Open ASR · Voice Arena Monsoon WER6.7#52
Open ASR · VoxPopuli AA Cleaned WER4.1#37
Open ASR · AMI WER12.6#19
Open ASR · Earnings-22 WER13.4#40
Open ASR · GigaSpeech WER9.4#28
Open ASR · VoxPopuli WER7.1#24
Open ASR · URGENT 2024 Clean WER6.6#43

FAQ

How much does Owsm Ctc v4 1B cost?›

There is no per-unit API price: self-host only.

Is Owsm Ctc v4 1B free to use?›

There is no free API. The weights are open, so you can run it yourself.

How good is Owsm Ctc v4 1B, and what is it best at?›

#49 of 61 in Speech to text.

Is Owsm Ctc v4 1B better than Whisper Large v3 Turbo?›

On Open ASR · RTFx, Owsm Ctc v4 1B scores 783.3 vs 810.5 — lower.

When was Owsm Ctc v4 1B released? Is there a newer version?›

Released 2025-01-16. It is the current version in its line.

Is Owsm Ctc v4 1B open source?›

Yes, the weights are open (cc-by-4.0 licence).

Can I run Owsm Ctc v4 1B locally?›

The weights are open and can be self-hosted; hardware needs are not confirmed yet.

What is Owsm Ctc v4 1B?›

Owsm Ctc v4 1B is an open-weights speech & voice model from espnet, released Jan 2025.

What are the best alternatives to Owsm Ctc v4 1B?›

Whisper Large v3 Turbo (better), Granite Speech 5.0 470M Turboctc (open weights).