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Open-weight model · Sentence similarity

AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4

by AutomatosX AutomatosX/AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4

AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4 is an open-weight model for sentence similarity from AutomatosX, released under other. It has 1.1B parameters and a 262,144-token context. At 16-bit it needs about 2.7 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index.

AXQuant CUDA NVFP4 W4A4 mixed precision development preview. Converted from the original upstream BF16 source, without AWQ. Native E2M1 FP4 weights and inputs use per-16 E4M3FN scales and FP32 global scales.

Parameters1.1B
Context262,144
Weights1.0 GB
Licenseother
AccessOpen weights
Monthly Downloads—

Runs On

What it takes to serve AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4 (1.1B 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 2.3 GB 2.7 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 1.1 GB 1.4 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 0.6 GB 0.7 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 Oct 7, 2026.

AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4 on every accelerator the SAVRN Index prices, at every precision

Model Card

AXQuant CUDA NVFP4 W4A4 mixed precision development preview. Converted from the original upstream BF16 source, without AWQ. Native E2M1 FP4 weights and inputs use per-16 E4M3FN scales and FP32 global scales. This is a retrieval embedding checkpoint, with no MTP or generative claim. Eligible attention and MLP matrices use NVFP4 W4A4. Embeddings and norms retain original BF16. Saved query: / passage: prefixes, bidirectional attention, mean pooling and L2 normalization. The native vLLM Ministral alias retains iscausal=false and every actual attention layer is verified as encoder-only. Factory conversion uses AXQuant's NumPy reference RTN encoder, independently checked against preserved BF16…

Excerpt from the card by AutomatosX, licensed other.

Configuration

Architecture
Ministral3Model
Context length (tokens)
262,144
Layers
16
Hidden size
2,048
Feed-forward size
6,144
Attention heads
24
Key/value heads
8
Head dimension
128
Vocabulary size
131,072
RoPE base
1e+06
Stored precision
bfloat16
Model type
ministral3
Quantization
compressed-tensors

Identity and Version

Repository
AutomatosX/AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4
Publisher
AutomatosX
Task
Sentence similarity
Modality
Text
Library
vllm
Parameters
1.1B parameters
Languages
Not stated by the source
Revision
68817d7b214f14f3574c5ff3630d325987941256
First published
2026-10-04
Last updated
2026-10-04

Files and Weights

27 files, 1.0 GB in total. The weights are 1 file totalling 1.0 GB in safetensors.

Weights1 file · 1.0 GB
Configuration19 files · 2.0 MB
Tokenizer2 files · 17.1 MB
Documentation3 files · 8.8 KB
Other1 file · 2.2 KB
Repository1 file · 1.6 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights1.0 GB b9a7825134ad
1_Pooling/config.jsonConfiguration298 B —
activation_calibration.jsonConfiguration18.1 KB —
axquant_cuda_manifest.jsonConfiguration6.5 KB —
axquant_cuda_plan.jsonConfiguration77.6 KB —
calibration/calibration-corpus.jsonConfiguration1.7 KB —
config.jsonConfiguration4.8 KB —
config_sentence_transformers.jsonConfiguration261 B —
development_runtime_smoke.jsonConfiguration2.4 KB —
evaluation/retrieval-corpus.jsonConfiguration806 B —
evaluation/rtx5090-bf16.jsonConfiguration465.8 KB —
evaluation/rtx5090-nvfp4.jsonConfiguration466.3 KB —
evaluation/thor-bf16.jsonConfiguration465.8 KB —
evaluation/thor-nvfp4.jsonConfiguration466.4 KB —
examples/embedding_smoke.pyConfiguration11.6 KB —
examples/smoke_cuda_ocr.pyConfiguration10.1 KB —
model.safetensors.index.jsonConfiguration33.3 KB —
modules.jsonConfiguration350 B —
provenance.jsonConfiguration3.3 KB —
sentence_bert_config.jsonConfiguration56 B —
LICENSEDocumentation2.8 KB —
NOTICEDocumentation1.4 KB —
README.mdDocumentation4.6 KB —
SHA256SUMS.txtOther2.2 KB —
.gitattributesRepository1.6 KB —
tokenizer.jsonTokenizer17.1 MB 797410dfb649
tokenizer_config.jsonTokenizer21.1 KB —

License and Download

License
other
Access
Open weights, no gate
Download size
1.0 GB
Download from AutomatosX

Released by AutomatosX through its official repository on Hugging Face.

Built From

Memory Requirements

PrecisionWeights in memory
As published1.0 GB
16-bit2.3 GB
8-bit1.1 GB
4-bit0.6 GB

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

Questions About AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4

How much GPU memory does AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4 need?

About 2.7 GB at 16-bit and 0.7 GB at 4-bit: the weights (1.1B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4 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.

What license is AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4 released under?

other, as its publisher declares it. Read the license text before commercial use.

What is AX-Nemotron-3-Embed-1B-CUDA-AXQ-NVFP4-W4A4's context length?

262,144 tokens, from the maximum position embeddings in its published configuration.

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