Whisper finetune for Japanese focused on general/anime domains. For usage instructions follow openai/whisper-large-v3-turbo. Due to vocab changes ctranslate2>=4.7.1 required for faster-whisper. For inference engines with hardcoded vocab, the token embedding can be padded. Finetuned from base with pruned vocab and encoder conv adaption, indices can be found in mapping.txt. Trained decoder only for 2^20 steps, batch size 64. Using a 45000 hour corpus (largest source is 17000 of filtered reazonspeech-all) with custom mixing ratio and augmentation to maintain long form performance and timestamps. Benchmarks. Competitive for size on test sets, particually good on JSUT-book. Also trained for…
Whisper is a pre-trained model for automatic speech recognition (ASR) and speech translation. Trained on 680k hours of labelled data, Whisper models demonstrate a strong ability to generalise to many datasets and domains without the need for fine-tuning.
Runs On
What it takes to serve whisper-tiny (38M parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.
| Precision | Weights | Memory needed | Cheapest setup | Per hour | Also fits |
|---|---|---|---|---|---|
| 16-bit | 0.1 GB | 0.1 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
| 8-bit | 0.0 GB | 0.0 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
| 4-bit | 0.0 GB | 0.0 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
Memory is the weights at that precision plus 20% for the runtime and a short context; a long context needs more. Prices are the lowest on-demand hourly rates in the SAVRN Index, read Sep 18, 2026.
SAVRN's Notes on whisper-tiny
At 16-bit the weights round to 0.1 GB and so does the memory needed, and the cheapest setup our Index lists is one MI300X with 192 GB at $1.85 an hour on-demand. Nobody buys a card for this; it rides on whatever accelerator is already running. OpenAI built it for automatic speech recognition and speech translation, trained on 680k hours of labeled data, with 38M parameters and 4 layers, and the files ship in safetensors, pytorch, jax and tf.
Apache 2.0 allows commercial use with notices kept and changes stated, so it can go straight into a product. What to check is the publisher's reported evaluations: 7.54% test WER on LibriSpeech clean, 17.15% on LibriSpeech other, and 141.0% on Common Voice 11.0 Hindi. The Hindi figure sits far above the English ones, so test your own audio before committing. The paper is arXiv:2212.04356; last updated February 29, 2024.
Model Card
By OpenAI, published under apache-2.0, revision 169d4a4341b3.
Whisper
Whisper is a pre-trained model for automatic speech recognition (ASR) and speech translation. Trained on 680k hours of labelled data, Whisper models demonstrate a strong ability to generalise to many datasets and domains without the need for fine-tuning.
Whisper was proposed in the paper Robust Speech Recognition via Large-Scale Weak Supervision by Alec Radford et al from OpenAI. The original code repository can be found here.
Disclaimer: Content for this model card has partly been written by the Hugging Face team, and parts of it were copied and pasted from the original model card.
Model details
Whisper is a Transformer based encoder-decoder model, also referred to as a sequence-to-sequence model. It was trained on 680k hours of labelled speech data annotated using large-scale weak supervision.
Configuration
- Architecture
- WhisperForConditionalGeneration
- Layers
- 4
- Vocabulary size
- 51,865
- Stored precision
- float32
- Model type
- whisper
Identity and Version
- Repository
- openai/whisper-tiny
- Publisher
- OpenAI
- Task
- Speech recognition
- Modality
- Audio
- Library
- transformers
- Parameters
- 38M parameters
- Languages
- en, zh, de, es, ru, ko, fr, ja
- Revision
- 169d4a4341b33bc18d8881c4b69c2e104e1cc0af
- First published
- 2022-09-26
- Last updated
- 2024-02-29
Files and Weights
16 files, 608.9 MB in total. The weights are 4 files totalling 604.5 MB in bin, h5, msgpack, safetensors.
Every file
| File | Type | Size | SHA-256 |
|---|---|---|---|
| flax_model.msgpack | Weights | 151.0 MB | a695f537d9f0 |
| model.safetensors | Weights | 151.1 MB | 7ebd0e69e781 |
| pytorch_model.bin | Weights | 151.1 MB | 9607f98a2b22 |
| tf_model.h5 | Weights | 151.3 MB | 4144af98f9f3 |
| added_tokens.json | Configuration | 34.6 KB | — |
| config.json | Configuration | 2.0 KB | — |
| generation_config.json | Configuration | 3.7 KB | — |
| normalizer.json | Configuration | 52.7 KB | — |
| preprocessor_config.json | Configuration | 185.0 KB | — |
| special_tokens_map.json | Configuration | 2.2 KB | — |
| README.md | Documentation | 19.8 KB | — |
| .gitattributes | Repository | 1.4 KB | — |
| merges.txt | Tokenizer | 493.9 KB | — |
| tokenizer.json | Tokenizer | 2.5 MB | — |
| tokenizer_config.json | Tokenizer | 282.7 KB | — |
| vocab.json | Tokenizer | 835.5 KB | — |
License and Download
- License
- apache-2.0
- Access
- Open weights, no gate
- Download size
- 604.5 MB
Released by OpenAI through its official repository on Hugging Face. Read the license.
Built From
- Described by arXiv:2212.04356
Evaluations
Each result is shown as reported, with the conditions its reporter stated. None is a SAVRN measurement. A comparison lines two results up only when their configuration, unit and setup are all stated and identical.
| Benchmark | Conditions | Result | Reported by | Revision | Date |
|---|---|---|---|---|---|
| Common Voice 11.0 | Configuration hiTask Automatic Speech RecognitionMetric Test WERComparison conditions not established | 141 | openai Publisher reported |
Evaluated revision not stated | — |
| LibriSpeech (clean) | Configuration cleanTask Automatic Speech RecognitionMetric Test WERComparison conditions not established | 7.54 | openai Publisher reported |
Evaluated revision not stated | — |
| LibriSpeech (other) | Configuration otherTask Automatic Speech RecognitionMetric Test WERComparison conditions not established | 17.15 | openai Publisher reported |
Evaluated revision not stated | — |
Memory Requirements
| Precision | Weights in memory |
|---|---|
| As published | 604.5 MB |
| 16-bit | 0.1 GB |
| 8-bit | 0.0 GB |
| 4-bit | 0.0 GB |
Weights only, from the published parameter count; the key-value cache and runtime add to this.
Built on This Model
- Quantized fromwhisper-tiny
- Derived fromwhisper-tiny
Questions About whisper-tiny
How much GPU memory does whisper-tiny need?
About 0.1 GB at 16-bit and 0 GB at 4-bit: the weights (38M parameters) plus a working margin. A long context needs more.
What is the cheapest GPU to run whisper-tiny on?
At 16-bit, 1x MI300X from $1.85 an hour; at 4-bit, 1x MI300X from $1.85 an hour, at the lowest on-demand prices the SAVRN Index lists.
Can I use whisper-tiny commercially?
Yes. whisper-tiny is released under Apache License 2.0. The Apache License 2.0 is a permissive open-source license. It permits commercial use, modification and redistribution. It requires keeping the license and copyright notices and any NOTICE file, stating significant changes, and it includes an express patent grant from contributors.
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