Cassini model downloads

Speech recognition, speaker diarization, speaker embedding and text embedding models for Cassini. Each file is compressed with seekable Zstandard and has a permanent SHA-256 address.

Downloads support resuming. Decompress each .zst file before loading the model; no archive extraction is needed.

Download manifest · SHA-256 checksums · Attribution and licenses

Parakeet TDT-CTC 110M — int8

Download: 95.41 MiB · Installed size: 125.56 MiB

FileDownloadInstalled
model.int8.onnx.zst95.40 MiB125.55 MiB
tokens.txt.zst4.92 KiB9.72 KiB

Parakeet TDT 0.6B v3 — int8

Download: 443.27 MiB · Installed size: 639.42 MiB

FileDownloadInstalled
encoder.int8.onnx.zst431.27 MiB621.97 MiB
decoder.int8.onnx.zst8.41 MiB11.30 MiB
joiner.int8.onnx.zst3.54 MiB6.06 MiB
tokens.txt.zst44.76 KiB91.74 KiB

Parakeet TDT 0.6B v3 — fp32

Download: 2.20 GiB · Installed size: 2.37 GiB (including optional files)

FileDownloadInstalled
encoder.onnx.zst35.43 MiB39.90 MiB
encoder.weights.zst2.11 GiB2.27 GiB
decoder.onnx.zst41.70 MiB45.05 MiB
joiner.onnx.zst22.23 MiB24.11 MiB
tokens.txt.zst44.76 KiB91.74 KiB
bpe.vocab.zst (optional)46.21 KiB114.66 KiB

Parakeet Ultra 0.6B — fp32

Download: 1.38 GiB · Installed size: 2.37 GiB (including optional files)

FileDownloadInstalled
encoder.onnx.zst35.43 MiB39.90 MiB
encoder.weights.zst1.31 GiB2.27 GiB
decoder.onnx.zst25.90 MiB45.05 MiB
joiner.onnx.zst13.67 MiB24.11 MiB
tokens.txt.zst44.76 KiB91.74 KiB
bpe.vocab.zst (optional)46.21 KiB114.66 KiB

Parakeet Ultra 0.6B — int8

Download: 443.37 MiB · Installed size: 639.51 MiB

FileDownloadInstalled
encoder.int8.onnx.zst431.35 MiB622.07 MiB
decoder.int8.onnx.zst8.43 MiB11.30 MiB
joiner.int8.onnx.zst3.54 MiB6.06 MiB
tokens.txt.zst44.76 KiB91.74 KiB

Silero VAD

Download: 458.35 KiB · Installed size: 628.76 KiB

FileDownloadInstalled
silero_vad.onnx.zst458.35 KiB628.76 KiB

Nemotron 3 Diarization — int8

Download: 61.91 MiB · Installed size: 99.15 MiB

FileDownloadInstalled
model.int8.onnx.zst61.91 MiB99.15 MiB

Nemotron 3 Diarization — fp32

Download: 162.92 MiB · Installed size: 379.43 MiB

FileDownloadInstalled
model.onnx.zst162.92 MiB379.43 MiB

Nemotron Speech Streaming English 0.6B — int8

Download: 424.47 MiB · Installed size: 631.26 MiB

FileDownloadInstalled
encoder.int8.onnx.zst418.57 MiB622.67 MiB
decoder.int8.onnx.zst4.87 MiB6.92 MiB
joiner.int8.onnx.zst1.03 MiB1.66 MiB
tokens.txt.zst4.63 KiB8.74 KiB

Nemotron 3.5 ASR Streaming 0.6B — int8

Download: 434.33 MiB · Installed size: 650.61 MiB

FileDownloadInstalled
encoder.int8.onnx.zst418.07 MiB627.14 MiB
decoder.int8.onnx.zst10.75 MiB14.28 MiB
joiner.int8.onnx.zst5.45 MiB9.06 MiB
tokens.txt.zst68.34 KiB128.36 KiB

EmbeddingGemma 2 (text) — int8

Download: 275.36 MiB · Installed size: 304.14 MiB

FileDownloadInstalled
model_quantized.onnx.zst24.03 KiB483.56 KiB
model_quantized.onnx_data.zst273.24 MiB299.19 MiB
tokenizer.model.zst2.09 MiB4.47 MiB

CAM++ speaker embedding (VoxCeleb)

Download: 25.88 MiB · Installed size: 28.23 MiB

FileDownloadInstalled
3dspeaker_speech_campplus_sv_en_voxceleb_16k.onnx.zst25.88 MiB28.23 MiB

Parakeet models by NVIDIA, ONNX exports distributed for sherpa-onnx, under CC BY 4.0. Parakeet Ultra by Moondream, post-trained from NVIDIA's Parakeet TDT 0.6B v3, ONNX export by Cassini, under CC BY 4.0. Nemotron 3 Diarization by NVIDIA, ONNX export by Cassini, under the OpenMDW License 1.1. Nemotron Speech Streaming English by NVIDIA, ONNX export distributed for sherpa-onnx, licensed by NVIDIA Corporation under the NVIDIA Open Model License. Nemotron 3.5 ASR Streaming by NVIDIA, ONNX export distributed for sherpa-onnx, under the OpenMDW License 1.1. Silero VAD by Silero Team, under the MIT license. EmbeddingGemma 2 by Google, ONNX export by onnx-community, under the Apache License 2.0. CAM++ speaker embedding by 3D-Speaker (Alibaba DAMO Academy), ONNX export distributed for sherpa-onnx, under the Apache License 2.0. Decompressed model contents are unchanged.