Project AURIONAI Use-Cases Research & Innovation
time series

Chronos-2

Amazon (AWS AI) zero-shot forecasting model with covariate in-context learning; report 17 Oct 2025. Context is 8,192 time steps.

AmazonAmazonUSA
Amazon
Levelmodel
Classtime series
Parameters120M
Context8,192
Released20 Oct 2025
Opennessopen weights permissive
Runs onsingle datacentre GPU, CPU server
Statusactive

Benchmark Results

vendor-reportedindependent
Chronos Benchmark IItime series
Claims SOTA zero-shotvendor-reported
no score in the notes
rank 117 Oct 2025 huggingface.co
fev-benchtime series
Claims SOTAvendor-reported
no score in the notes
rank 120 Oct 2025 amazon.science
GIFT-Evaltime series
zero-shot foundation-model CRPS rank, lower is bettervendor-reported
23.5
02040

Score in mean CRPS rank. Lower is better.

Toto 2.0 report (Datadog)Jun 2026 arxiv.org
pretrainedindependentno test-data leakage
0.698
00.71.4

Score in MASE (geo-mean, normalised to Seasonal Naive). Lower is better.

Leaderboard rebuilt from the published raw results, 143 entries covering all 97 configurations9 Oct 2026 huggingface.co
pretrained; rank is average CRPS rankindependentno test-data leakage
0.485
00.51

Score in CRPS (geo-mean, normalised to Seasonal Naive). Lower is better.

rank 57 of 143, Leaderboard rebuilt from the published raw results, 143 entries covering all 97 configurations9 Oct 2026 huggingface.co
Claims first among pretrained models, beating TimesFM-2.5 and TiRexvendor-reported
no score in the notes
rank 120 Oct 2025 amazon.science
Where this comes from
Every score names who ran it: vendor-reported, maintainer-run or independent. A rank is shown with the population it was ranked in (gap rule 3).

Lineage

successor
Chronos-Bolt to Chronos-2: successor, high confidenceChronos to Chronos-2: successor, high confidenceChronos to Chronos-Bolt: successor, medium confidenceChronos-BoltChronos-BoltAmazonChronosChronosAmazon, Mar 2024Chronos-2Chronos-2Amazon, Oct 2025
AmazonChronos-Bolt is the parent (successor)high confidencemodel card
AmazonChronos is the parent (successor)high confidencepress claim
Where this comes from
Parent and child relations from model cards, Hugging Face base_model fields and the genealogy tables of the research notes. The tree shows two generations each way, 3 models. Confidence and evidence are the notes' own.

Industry Use Cases

Industrial
Industrial forecasting (load, throughput, demand)
Retail and Logistics
Demand forecasting

R&D Topics

Time-series foundation modelsproduced by

Identity

Developer
Amazon
Family
not in the notes
Released
20 Oct 2025 sourcesregistry date
Weights published
–
Record checked
10 Oct 2026
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.

Architecture and Size

Architecture
dense transformer Encoder-only, T5-encoder-inspired; group attention for cross-series and covariate in-context learning; quantile output; horizon 1,024
Total parameters
120M sources
Active parameters
–
Checkpoint parameters
–
Note
about 120M
Context length
8,192 tokens
Input
time series
Output
time series
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).

Openness and Access

Openness
open weights permissive
Licence
Apache License 2.0 sources
Access routes
open weights download, cloud marketplace
Where this comes from
The licence file governs over registry tags and aggregator labels.

Deployment

Runs on
single datacentre GPU, CPU server
Footprint
More than 300 forecasts/s on one A10G
Runtimes
not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.

Indonesia

Indonesian support
not stated
Regional languages
not in the notes
Jakarta hosting
unknown
Languages
not in the notes
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.

Sources

  1. amazon/chronos-2 , Hugging Face huggingface.co https://huggingface.co/amazon/chronos-2
  2. TimesFM vs Chronos vs Moirai: The Leader's Weights Ban Production beri.net https://www.beri.net/article/timesfm-vs-chronos-vs-moirai-time-series-foundation-model-licence-bigquery-sagemaker-cost-2026
  3. arxiv.org/pdf/2605.20119 https://arxiv.org/pdf/2605.20119
  4. Introducing Chronos-2: From univariate to universal forecasting amazon.science https://www.amazon.science/blog/introducing-chronos-2-from-univariate-to-universal-forecasting

To cite this page: Project AURION, AI Use-Cases Research & Innovation, "Chronos-2", https://aurion.semai.id/models/amazon-chronos-2/, records of October 2026.