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Phonon 2

Sep 2026
FPhonon 2
Compare in
on
self-host onlyprice
7.2Open ASR
Sep 2026released
enLanguages

Ranking?

Full ranking →
1Speech v3.13.92Resonant 1 Flash43Zoom Scribe v14.24Azure Speech 06 20264.35ASR K14.6
···
39Distil Large v3.5740Phonon 27.241Zipformer-cr-ctc-transducer-XL-290M (fast-gpu-asr, transducer_modified_beam_search)7.4

Run it yourself

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

Benchmarks

in Speech & Voice
Open ASR · average WER7.2#40
Open ASR · RTFx1,976.5#11
Open ASR · AMI Cleaned WER9.3#34
Open ASR · Earnings-22 Cleaned AA Chunked WER7#26
Open ASR · GigaSpeech Cleaned WER8.4#36
Open ASR · LibriSpeech Clean WER1.7#45
Open ASR · LibriSpeech Other WER3.9#42
Open ASR · SPGISpeech WER3.7#55
Open ASR · URGENT 2024 WER14.9#41
Open ASR · Voice Arena Monsoon WER4.9#45
Open ASR · VoxPopuli AA Cleaned WER2.5#12
Open ASR · URGENT 2024 Clean WER7.7#46

FAQ

How much does Phonon 2 cost?›

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

Is Phonon 2 free to use?›

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

How good is Phonon 2, and what is it best at?›

#40 of 61 in Speech to text.

Is Phonon 2 better than Distil Large v3.5?›

On Open ASR · average WER, Phonon 2 scores 7.2 vs 7 — about the same.

When was Phonon 2 released? Is there a newer version?›

Released 2026-09-28. It is the current version in its line.

Is Phonon 2 open source?›

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

Can I run Phonon 2 locally?›

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

What is Phonon 2?›

Phonon 2 is an open-weights speech & voice model from FermionResearch, released Sep 2026.

What are the best alternatives to Phonon 2?›

Zoom Scribe V2 Pro (better), Phi 4 Multimodal Instruct (open weights).