Hyena-3-slim

Closed weights Stanford University,University of Montreal / Université de Montréal,Mila - Quebec AI (originally Montreal Institute for Learning Algorithms) 125M parameters February 2023

No estimate

No hardware requirements for this model

The weights for this model have not been published, so it cannot be downloaded or run on your own hardware at any size. It is reachable only through its provider, and no graphics card changes that.

On record

Full specification

Everything on record for this model. Most of it describes how it was trained rather than how it runs — useful context for judging how much work went into it, and how it compares with models built at a different scale.

Origin

Who built this model, where, and when it was published.

Organisation
Stanford University,University of Montreal / Université de Montréal,Mila - Quebec AI (originally Montreal Institute for Learning Algorithms)
Organisation type
Academia,Academia,Academia
Country
United States of America, Canada
Published
21 February 2023
Authors
Michael Poli, Stefano Massaroli, Eric Nguyen, Daniel Y. Fu, Tri Dao, Stephen Baccus, Yoshua Bengio, Stefano Ermon, Christopher Ré

What it does

The problem areas the model was built for. A model can carry several of each.

Domain
Language
Task
Language modeling/generation

Size

How large the model is and how much data it was trained on. Parameters are the figure that decides whether it fits on a given graphics card.

Parameters
125M
Training data
tokens

Availability

Whether you can obtain the model and run it on your own hardware, which is what decides if any of the graphics-card figures on this page apply.

Weights
Closed — provider access only
Model access
Unreleased
Training code
Unreleased

apache 2.0 https://github.com/HazyResearch/safari (the repo doesn't seem to contain Hyena-3-slim)

How it is classified

Labels the source dataset applies when tracking notable models, and how confident it is in the entry.

Record confidence
Unknown
Citations
497
Benchmark data
Hyena-3-slim

Sources

Where this record came from and when it was last checked.

Reference
Hyena Hierarchy: Towards Larger Convolutional Language Models
Last updated
25 May 2026

What the numbers mean

What this model is

Hyena-3-slim was published by Stanford University,University of Montreal / Université de Montréal,Mila - Quebec AI (originally Montreal Institute for Learning Algorithms), in United States of America, in February 2023. academia,Academia,Academia is the category the publisher falls under.

It works in Language, and is recorded as doing language modeling/generation.

Because the weights are not available, none of the hardware figures elsewhere on this site apply to it.

Answers

Hyena-3-slim — common questions

01

Is Hyena-3-slim open source?

No. Hyena-3-slim has not had its weights published, so it exists only as a service controlled by its owner.

02

How many parameters does Hyena-3-slim have?

Hyena-3-slim has 125M parameters. That figure is the total, and it is what decides how much memory the model needs — roughly half a gigabyte per billion at the compression most people use.

03

Who created Hyena-3-slim?

Hyena-3-slim was published by Stanford University,University of Montreal / Université de Montréal,Mila - Quebec AI (originally Montreal Institute for Learning Algorithms), based in United States of America, categorised as academia,Academia,Academia.

04

When was Hyena-3-slim released?

Hyena-3-slim was published in February 2023. Capability per parameter has improved considerably since, so a newer model of the same size is often the better use of the same hardware.

05

What is Hyena-3-slim used for?

Hyena-3-slim works in Language, and is recorded as handling language modeling/generation. Models frequently carry more than one of each, and the tags describe purpose rather than capability limits.

06

What GPU do I need to run Hyena-3-slim?

None. Hyena-3-slim is a closed model — its weights were never published, so it cannot be downloaded or run on your own hardware at any price. It is reachable only through its provider.

Source

Original publication

Record last updated 25 May 2026

The other direction

Looking at it from the other side?

This page starts from the model. If you already own a card and want to know everything it will run, start from the hardware instead.