This page lists all supported ASR model checkpoints released by NVIDIA NeMo. Benchmark scores for each model can be found on its
.
For community fine-tunes built on these checkpoints, see
Featured Community Checkpoints
.
Glossary
Term
Definition
ASR
Automatic Speech Recognition — transcribing speech to text
AST
Automatic Speech Translation — translating speech to text from one language to another
AED
Attention Encoder-Decoder — autoregressive decoder using cross-attention (Canary family)
CTC
Connectionist Temporal Classification — non-autoregressive decoder
RNN-T
Recurrent Neural Network Transducer — autoregressive streaming-friendly decoder
TDT
Token-and-Duration Transducer — extends RNN-T with duration prediction for faster inference
Hybrid
Joint RNN-T + CTC model — both decoders trained together, either usable at inference
PnC
Punctuation and Capitalization in the output
SALM
Speech Augmented Language Model — combines a speech encoder with a large language model
Streaming
Real-time / cache-aware inference capability
EU4
English, German, Spanish, French
EU25
English, German, Spanish, French, Italian, Polish, Portuguese, Dutch, Russian, Ukrainian, Belarusian, Croatian, Czech, Bulgarian, Danish, Estonian, Finnish, Greek, Hungarian, Latvian, Lithuanian, Maltese, Romanian, Slovak, Slovenian, Swedish
Canary Models (AED)
Multi-task encoder-decoder models supporting ASR, AST, PnC, and timestamps across multiple languages.
Model
Decoder
Capabilities
Language
Size
AED
ASR, AST, PnC, timestamps
EU25
1B
SALM
ASR, AST, PnC, timestamps
EU25
2.5B
AED
ASR, AST, PnC, timestamps, fast
EU4
1B
AED
ASR, AST, PnC, timestamps, fast
EU4
180M
AED
ASR, AST, PnC
EU4
1B
Parakeet Models
High-accuracy ASR models built on the FastConformer encoder architecture. Parakeet, Nemotron Speech, and the stt_*_fastconformer_* models below all share the same underlying FastConformer encoder; the different names reflect release branding, not architectural differences.
Model
Decoder
Capabilities
Language
Size
TDT
ASR, PnC, timestamps
English
0.6B
TDT
ASR, PnC, timestamps
English
0.6B
TDT
ASR, timestamps
English
1.1B
Hybrid TDT+CTC
ASR, timestamps
English
1.1B
Hybrid TDT+CTC
ASR, timestamps
Japanese
0.6B
Hybrid TDT+CTC
ASR, timestamps
English
110M
RNN-T
ASR, timestamps
English
1.1B
RNN-T
ASR, timestamps
English
0.6B
CTC
ASR
English
1.1B
CTC
ASR
English
0.6B
CTC
ASR
Vietnamese
0.6B
RNN-T
ASR
Danish
110M
Streaming Models
Cache-aware models for real-time / low-latency inference.
Model
Decoder
Capabilities
Language
Size
nemotron-3.5-asr-streaming-0.6b
Hybrid
ASR, streaming
40 languages
0.6B
multitalker-parakeet-streaming-0.6b-v1
RNN-T
ASR, multitalker, streaming
English
0.6B
RNN-T
ASR, end-of-utterance, streaming
English
120M
stt_en_fastconformer_hybrid_large_streaming_multi
Hybrid
ASR, streaming, multiple look-aheads
English
Large
stt_en_fastconformer_hybrid_medium_streaming_80ms_pc
Hybrid
ASR, PnC, streaming
English
Medium
stt_en_fastconformer_hybrid_medium_streaming_80ms
Hybrid
ASR, streaming
English
Medium
stt_ka_fastconformer_hybrid_transducer_ctc_large_streaming_80ms_pc
Hybrid
ASR, PnC, streaming
Georgian
Large
stt_en_fastconformer_hybrid_large_streaming_1040ms
Hybrid
ASR, streaming
English
Large
FastConformer English Models (Non-Streaming)
Model
Decoder
Capabilities
Language
Size
stt_en_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
English
Large
stt_en_fastconformer_ctc_large
CTC
ASR
English
Large
stt_en_fastconformer_ctc_xlarge
CTC
ASR
English
XLarge
stt_en_fastconformer_ctc_xxlarge
CTC
ASR
English
XXLarge
stt_en_fastconformer_transducer_large
RNN-T
ASR
English
Large
stt_en_fastconformer_transducer_xlarge
RNN-T
ASR
English
XLarge
stt_en_fastconformer_transducer_xxlarge
RNN-T
ASR
English
XXLarge
stt_en_fastconformer_tdt_large
TDT
ASR
English
Large
FastConformer Multilingual Models
Single-language FastConformer Hybrid models. Models with _pc suffix support punctuation and capitalization.
Model
Decoder
Capabilities
Language
Size
stt_multilingual_fastconformer_hybrid_large_pc_blend_eu
Hybrid
ASR, PnC
Multilingual EU
Large
stt_de_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
German
Large
stt_es_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Spanish
Large
stt_es_fastconformer_hybrid_large_pc_nc
Hybrid
ASR, Punctuation only
Spanish
Large
stt_fr_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
French
Large
stt_it_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Italian
Large
stt_ru_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Russian
Large
stt_ua_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Ukrainian
Large
stt_pl_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Polish
Large
stt_hr_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Croatian
Large
stt_be_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Belarusian
Large
stt_nl_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Dutch
Large
stt_pt_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Portuguese
Large
stt_fa_fastconformer_hybrid_large
Hybrid
ASR
Farsi
Large
stt_ka_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Georgian
Large
stt_hy_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Armenian
Large
stt_ar_fastconformer_hybrid_large_pc_v1.0
Hybrid
ASR, PnC
Arabic
Large
stt_ar_fastconformer_hybrid_large_pcd_v1.0
Hybrid
ASR, PnC (diacritized)
Arabic
Large
stt_uz_fastconformer_hybrid_large_pc
Hybrid
ASR, PnC
Uzbek
Large
stt_kk_ru_fastconformer_hybrid_large
Hybrid
ASR
Kazakh + Russian
Large
Loading Models
All models (except SALM — see
) can be loaded via the from_pretrained() API:
importnemo.collections.asrasnemo_asrmodel=nemo_asr.models.ASRModel.from_pretrained("nvidia/parakeet-tdt-0.6b-v2")