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Open-weight model · Time series forecasting

chronos-t5-small

by Amazon amazon/chronos-t5-small

Update Feb 14, 2025: Chronos-Bolt & original Chronos models are now available on Amazon SageMaker JumpStart! Check out the tutorial notebook to learn how to deploy Chronos endpoints for production use in a few lines of code.

Parameters46M
Context
Weights184.6 MB
Licenseapache-2.0
AccessOpen weights
Monthly Downloads929.5k

Runs On

What it takes to serve chronos-t5-small (46M 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 0.1 GB 0.1 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 0.0 GB 0.1 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 0.0 GB 0.0 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.

SAVRN's Notes on chronos-t5-small

Amazon's own notes point past this model. Chronos-t5-small is the original Chronos, 46M parameters on a T5 architecture, and the publisher says the Chronos-Bolt line released November 27, 2024 runs with 5% lower error, up to 250 times faster and 20 times more memory-efficient at the same size. The original forecasts time series by turning the values into tokens, with a vocabulary of 4,096. Memory is 0.1 GB at 16-bit, and the cheapest host we list, one MI300X at $1.85 an hour, is oversized for it many times over. We would run it wherever a load-forecast service already lives.

Under Apache 2.0 a commercial deployment and modifications are fine, with notices kept. Check two things: no context length is recorded, so confirm the history window in the chronos-forecasting library before sizing inputs, and read the Chronos paper, arXiv:2403.07815, against Bolt before choosing.

Model Card

By Amazon, published under apache-2.0, revision a971ba21945c.

Update Feb 14, 2025: Chronos-Bolt & original Chronos models are now available on Amazon SageMaker JumpStart! Check out the tutorial notebook to learn how to deploy Chronos endpoints for production use in a few lines of code.

Update Nov 27, 2024: We have released Chronos-Bolt models that are more accurate (5% lower error), up to 250 times faster and 20 times more memory-efficient than the original Chronos models of the same size. Check out the new modelshere.

Read the full model card (570 words)

Configuration

Architecture
T5ForConditionalGeneration
Vocabulary size
4,096
Stored precision
float32
Model type
t5

Identity and Version

Repository
amazon/chronos-t5-small
Publisher
Amazon
Task
Time series forecasting
Modality
Time series
Library
chronos-forecasting
Parameters
46M parameters
Languages
Not stated by the source
Revision
a971ba21945c4f1796b17a91fe69214b5f4ad472
First published
2024-02-21
Last updated
2025-11-21

Files and Weights

6 files, 184.9 MB in total. The weights are 1 file totalling 184.6 MB in safetensors.

Weights1 file · 184.6 MB
Configuration2 files · 1.3 KB
Documentation1 file · 6.1 KB
Other1 file · 232.3 KB
Repository1 file · 1.5 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights184.6 MB 9c8b6fde5300
config.jsonConfiguration1.1 KB
generation_config.jsonConfiguration142 B
README.mdDocumentation6.1 KB
figures/main-figure.pngOther232.3 KB
.gitattributesRepository1.5 KB

License and Download

License
apache-2.0
Access
Open weights, no gate
Download size
184.6 MB
Download from Amazon

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

Built From

Memory Requirements

PrecisionWeights in memory
As published184.6 MB
16-bit0.1 GB
8-bit0.0 GB
4-bit0.0 GB

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

Compare chronos-t5-small

Questions About chronos-t5-small

How much GPU memory does chronos-t5-small need?

About 0.1 GB at 16-bit and 0 GB at 4-bit: the weights (46M parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run chronos-t5-small 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 chronos-t5-small commercially?

Yes. chronos-t5-small is released under Apache License 2.0. The Apache License 2.0 is a permissive open-source license. It permits commercial use, modification and redistribution. It requires keeping the license and copyright notices and any NOTICE file, stating significant changes, and it includes an express patent grant from contributors.

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