Phonon 2 measured on 12 of 81 Speech to text benchmarks12
BenchmarkByScoreRank
No benchmark matches
self-host onlyprice
7.2Open ASR
Sep 2026released
enLanguages
Ranking?
Full ranking →···
10Granite Speech 4.1 2B Nar2,112.611Phonon 21,976.512Niagara 84M Batch.en1,940.8Alternatives?
ModelScoreCostPriceWhat changes
BetterParakeet TDT 0.6B V3, TogetheraiOpen×3.2—$0.002
OpenGranite Speech 5.0 470M Turboctc×10.7——BetterGranite Speech 5.0 470M Turboctc NcOpen×10.5——sBetterZipformer-cr-ctc-transducer-XL-290M (fast-gpu-asr, transducer_modified_beam_search)Open×9.8——aBetterNiagara 9M Batch.enOpen×3.7——ModelScoreCostPriceWhat changes
Nothing here yet.
ModelScoreCostPriceWhat changes
Parakeet TDT 0.6B V3, TogetheraiOpen×3.2—$0.002Granite Speech 5.0 470M TurboctcOpen×10.7——Granite Speech 5.0 470M Turboctc NcOpen×10.5——sZipformer-cr-ctc-transducer-XL-290M (fast-gpu-asr, transducer_modified_beam_search)Open×9.8——aNiagara 9M Batch.enOpen×3.7——ModelScoreCostPriceWhat changes
Granite Speech 5.0 470M TurboctcOpen×10.7——Granite Speech 5.0 470M Turboctc NcOpen×10.5——sZipformer-cr-ctc-transducer-XL-290M (fast-gpu-asr, transducer_modified_beam_search)Open×9.8——aNiagara 9M Batch.enOpen×3.7——Parakeet TDT 0.6B V3, TogetheraiOpen×3.2—$0.002ModelScoreCostPriceWhat changes
FPhonon 2.5Openn/a——Languages: not verifiedFPhonon-2.5 EnglishOpenn/a——Languages: not verifiedAll FermionResearch models →Run it yourself
Fits onhardware needs not verified yet
LicenceCC BY 4.0free for commercial use
Benchmarks
in Speech & VoiceOpen ASR · average WER7.2#40
Open ASR · RTFx1,976.5#11
Open ASR · URGENT 2024 WER14.9#41
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 Granite Speech 4.1 2B Nar?›
On Open ASR · RTFx, Phonon 2 scores 1,976.5 vs 2,112.6 — lower.
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?›
Parakeet TDT 0.6B V3, Togetherai (better), Granite Speech 5.0 470M Turboctc (open weights).