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Open-weight model · Audio classification

nocturne-v1-teacher

by Stratus Labs stratus-labs/nocturne-v1-teacher

nocturne-v1-teacher is an open-weight model for audio classification from Stratus Labs, released under Creative Commons Attribution 4.0. It has 88M parameters. At 16-bit it needs about 0.2 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index. It draws 101 downloads a month.

Nocturne is a bioacoustic species classifier trained by Stratus Labs covering the taxa that BirdNET and Perch don't: insects, amphibians, non-bird mammals, and reptiles.

Parameters88M
Context—
Weights351.6 MB
Licensecc-by-4.0
AccessOpen weights
Monthly Downloads101

Runs On

What it takes to serve nocturne-v1-teacher (88M 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 0.2 GB 0.2 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 0.1 GB 0.1 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 0.0 GB 0.1 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.

nocturne-v1-teacher on every accelerator the SAVRN Index prices, at every precision

Model Card

By Stratus Labs, published under cc-by-4.0, revision 4ce0969cada4.

Nocturne v1.1 (Teacher) — Bioacoustic Species Recognition for Non-Bird Taxa

Nocturne is a bioacoustic species classifier trained by Stratus Labs covering the taxa that BirdNET and Perch don't: insects, amphibians, non-bird mammals, and reptiles. It's the "night side" of the soundscape — the taxa that are dominantly nocturnal or crepuscular, whose acoustic signal is the half of biodiversity monitoring bird-focused models leave behind.

v1.1 (this revision) uses a 3× higher learning rate than v1 during backbone fine-tuning. Independent runs at both LRs plateaued around macro-F1 0.10; v1.1 edged past by ~3 %. Prior v1 weights are preserved in the commit history if you want to pin to revision=<v1-commit-sha>.

Read the full model card (1,137 words)

Configuration

Model type
nocturne_ast

Identity and Version

Repository
stratus-labs/nocturne-v1-teacher
Publisher
Stratus Labs
Task
Audio classification
Modality
Audio
Library
transformers
Parameters
88M parameters
Languages
en
Revision
4ce0969cada4b111b615f3650e2b1ecd619cf835
First published
2026-08-28
Last updated
2026-09-24

Files and Weights

9 files, 351.9 MB in total. The weights are 1 file totalling 351.6 MB in safetensors.

Weights1 file · 351.6 MB
Configuration5 files · 261.3 KB
Tokenizer1 file · 67.2 KB
Documentation1 file · 9.7 KB
Repository1 file · 1.5 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights351.6 MB 5391ca66444c
config.jsonConfiguration147.9 KB —
eval_report.jsonConfiguration1.2 KB —
model.pyConfiguration6.1 KB —
thresholds.jsonConfiguration105.3 KB —
training_config.yamlConfiguration738 B —
README.mdDocumentation9.7 KB —
.gitattributesRepository1.5 KB —
vocab.jsonTokenizer67.2 KB —

License and Download

License
cc-by-4.0
Access
Open weights, no gate
Download size
351.6 MB
Download from Stratus Labs

Released by Stratus Labs through its official repository on Hugging Face. Read the license.

Built From

  • Trained on (disclosed) InsectSet459
  • Trained on (disclosed) iNat-Sounds-2024

Memory Requirements

PrecisionWeights in memory
As published351.6 MB
16-bit0.2 GB
8-bit0.1 GB
4-bit0.0 GB

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

Questions About nocturne-v1-teacher

How much GPU memory does nocturne-v1-teacher need?

About 0.2 GB at 16-bit and 0.1 GB at 4-bit: the weights (88M parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run nocturne-v1-teacher 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 nocturne-v1-teacher commercially?

Yes. nocturne-v1-teacher is released under Creative Commons Attribution 4.0. CC BY 4.0 permits sharing and adapting the work, including commercially, provided the creator is credited and changes are indicated.

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