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Open-weight model · Time series forecasting

chronos-t5-base

by Amazon amazon/chronos-t5-base

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.

Parameters201M
Context
Weights805.5 MB
Licenseapache-2.0
AccessOpen weights
Monthly Downloads467.7k

Runs On

What it takes to serve chronos-t5-base (201M 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 0.4 GB 0.5 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 0.2 GB 0.2 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 0.1 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 Sep 18, 2026.

SAVRN's Notes on chronos-t5-base

Half a gigabyte is all Chronos-T5-base needs at 16-bit, 0.2 GB at 8-bit, 0.1 GB at 4-bit. The cheapest slot in the Index is one MI300X with 192 GB at $1.85 an hour on-demand, so this forecaster takes a sliver of the card and belongs beside other work, not on a GPU of its own. Its job is time series forecasting, on a 201M parameter T5 backbone stored in float32.

Apache 2.0 allows commercial use, modification and redistribution, provided the license and NOTICE file travel with it, so a forecasting service inside your own facility owes Amazon nothing. Amazon's card says the later Chronos-Bolt models cut error 5 percent and run up to 250 times faster with 20 times better memory efficiency, so confirm this original build is the one you want. No context length is listed, so verify the history window your series needs.

Model Card

By Amazon, published under apache-2.0, revision ad294eaacead.

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-base
Publisher
Amazon
Task
Time series forecasting
Modality
Time series
Library
chronos-forecasting
Parameters
201M parameters
Languages
Not stated by the source
Revision
ad294eaacead15db499b740ea4122266dd2a81a2
First published
2024-02-21
Last updated
2025-11-21

Files and Weights

6 files, 805.8 MB in total. The weights are 1 file totalling 805.5 MB in safetensors.

Weights1 file · 805.5 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.safetensorsWeights805.5 MB 44a2eef44aa1
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
805.5 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 published805.5 MB
16-bit0.4 GB
8-bit0.2 GB
4-bit0.1 GB

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

Compare chronos-t5-base

Questions About chronos-t5-base

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

About 0.5 GB at 16-bit and 0.1 GB at 4-bit: the weights (201M parameters) plus a working margin. A long context needs more.

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

Yes. chronos-t5-base 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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