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Open-weight model · Text generation

S1-mini-MLX-8bit

by David Larrea davidalarrea/S1-mini-MLX-8bit

Converted with mlx-lm 0.31.3. A six-case deterministic sanity check matched four upstream reference strings exactly. The two differences were a retained leading “So,” and one comma variation.

Parameters596M
Context40,960
Weights633.4 MB
Licenseother
AccessOpen weights
Monthly Downloads

Runs On

What it takes to serve S1-mini-MLX-8bit (596M 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 1.2 GB 1.4 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 0.6 GB 0.7 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 0.3 GB 0.4 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

Converted with mlx-lm 0.31.3. A six-case deterministic sanity check matched four upstream reference strings exactly. The two differences were a retained leading “So,” and one comma variation. This is a small functional check, not the upstream 7,519-case evaluation. A 0.6B-parameter text normalizer for speech-to-text output. It takes a raw ASR transcript and rewrites it as clean written text: fillers removed, false starts and self-corrections resolved to the value the speaker landed on, punctuation and capitalization applied, and spoken numbers, dates, times, currency and email addresses rendered in written form. On a held-out set of 7,519 English cases it reaches 94.8% token accuracy, and…

Excerpt from the card by David Larrea, licensed other.

Configuration

Architecture
Qwen3ForCausalLM
Context length (tokens)
40,960
Layers
28
Hidden size
1,024
Feed-forward size
3,072
Attention heads
16
Key/value heads
8
Head dimension
128
Vocabulary size
151,936
RoPE base
1,000,000
Stored precision
bfloat16
Model type
qwen3

Identity and Version

Repository
davidalarrea/S1-mini-MLX-8bit
Publisher
David Larrea
Task
Text generation
Modality
Text
Library
mlx
Parameters
596M parameters
Languages
en
Revision
740d0b35375a6bf9694c1d263d2b4258ad519dbc
First published
2026-09-18
Last updated
2026-09-18

Files and Weights

11 files, 645.1 MB in total. The weights are 1 file totalling 633.4 MB in safetensors.

Weights1 file · 633.4 MB
Configuration3 files · 51.0 KB
Tokenizer2 files · 11.4 MB
Documentation2 files · 30.7 KB
Other2 files · 158.2 KB
Repository1 file · 1.6 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights633.4 MB 2e196d3cab3a
config.jsonConfiguration1.0 KB
generation_config.jsonConfiguration181 B
model.safetensors.index.jsonConfiguration49.8 KB
LICENSEDocumentation11.9 KB
README.mdDocumentation18.9 KB
banner.jpgOther154.0 KB c17fc850506c
chat_template.jinjaOther4.2 KB
.gitattributesRepository1.6 KB
tokenizer.jsonTokenizer11.4 MB be75606093db
tokenizer_config.jsonTokenizer729 B

License and Download

License
other
Access
Open weights, no gate
Download size
633.4 MB
Download from David Larrea

Released by David Larrea through its official repository on Hugging Face.

Built From

  • Derived from superwhisper/s1-mini
  • Described by arXiv:2505.09388
  • Quantized from superwhisper/s1-mini

Memory Requirements

PrecisionWeights in memory
As published633.4 MB
16-bit1.2 GB
8-bit0.6 GB
4-bit0.3 GB

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

Questions About S1-mini-MLX-8bit

How much GPU memory does S1-mini-MLX-8bit need?

About 1.4 GB at 16-bit and 0.4 GB at 4-bit: the weights (596M parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run S1-mini-MLX-8bit 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 S1-mini-MLX-8bit released under?

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

What is S1-mini-MLX-8bit's context length?

40,960 tokens, from the maximum position embeddings in its published configuration.

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