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Open-weight model · Speech recognition

whisper-ja-1.5B

by Efwkjn efwkjn/whisper-ja-1.5B

For usage instructions follow openai/whisper-large-v3. Large-v3 finetune trained as a baseline with smaller checkpoints in progress. Expecting worse long form and equal short form. Benchmarks.

Parameters1.5B
Context
Weights4.9 GB
License
AccessOpen weights
Monthly Downloads535

Runs On

What it takes to serve whisper-ja-1.5B (1.5B parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.

PrecisionWeightsMemory neededCheapest setupPer hourAlso fits
16-bit 3.1 GB 3.7 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 1.5 GB 1.9 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 0.8 GB 0.9 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.

Model Card

For usage instructions follow openai/whisper-large-v3. Large-v3 finetune trained as a baseline with smaller checkpoints in progress. Expecting worse long form and equal short form. Benchmarks. Has occasional repetition issue compared to previous models but achieves competitive/SOTA CER across all tested sets.

Excerpt from the card by Efwkjn.

Configuration

Architecture
WhisperForConditionalGeneration
Layers
32
Vocabulary size
51,866
Stored precision
float16
Model type
whisper

Identity and Version

Repository
efwkjn/whisper-ja-1.5B
Publisher
Efwkjn
Task
Speech recognition
Modality
Audio
Library
Not stated by the source
Parameters
1.5B parameters
Languages
ja
Revision
72c13fb7b6cc2a831780cdd79cd1a829e77bab02
First published
2026-02-13
Last updated
2026-09-18

Files and Weights

13 files, 4.9 GB in total. The weights are 1 file totalling 4.9 GB in safetensors.

Weights1 file · 4.9 GB
Configuration5 files · 92.8 KB
Tokenizer4 files · 4.3 MB
Documentation2 files · 53.5 KB
Repository1 file · 1.5 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights4.9 GB 0bf92cf794eb
added_tokens.jsonConfiguration34.6 KB
config.jsonConfiguration1.3 KB
generation_config.jsonConfiguration3.9 KB
normalizer.jsonConfiguration52.7 KB
preprocessor_config.jsonConfiguration340 B
BENCH.mdDocumentation52.9 KB
README.mdDocumentation610 B
.gitattributesRepository1.5 KB
merges.txtTokenizer493.9 KB
tokenizer.jsonTokenizer2.5 MB
tokenizer_config.jsonTokenizer282.8 KB
vocab.jsonTokenizer1.0 MB

License and Download

License
Not stated by the source
Access
Open weights, no gate
Download size
4.9 GB
Download from Efwkjn

Released by Efwkjn through its official repository on Hugging Face.

Memory Requirements

PrecisionWeights in memory
As published4.9 GB
16-bit3.1 GB
8-bit1.5 GB
4-bit0.8 GB

Weights only, from the published parameter count; the key-value cache and runtime add to this.

Questions About whisper-ja-1.5B

How much GPU memory does whisper-ja-1.5B need?

About 3.7 GB at 16-bit and 0.9 GB at 4-bit: the weights (1.5B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run whisper-ja-1.5B 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.

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