Kronos is the first open-source foundation model for financial candlesticks (K-lines), trained on data from over 45 global exchanges. It is designed to handle the unique, high-noise characteristics of financial data. Kronos is a family of decoder-only foundation models, pre-trained specifically for the "language" of financial markets—K-line sequences. It leverages a novel two-stage framework: 1. A specialized tokenizer first quantizes continuous, multi-dimensional K-line data (OHLCV) into hierarchical discrete tokens. 2. A large, autoregressive Transformer is then pre-trained on these tokens, enabling it to serve as a unified model for diverse quantitative tasks. The success of large-scale…
Toto (Time Series Optimized Transformer for Observability) is a family of time series foundation models for multivariate forecasting developed by Datadog.
Runs On
What it takes to serve Toto-2.0-4m (4M parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.
| Precision | Weights | Memory needed | Cheapest setup | Per hour | Also fits |
|---|---|---|---|---|---|
| 16-bit | 0.0 GB | 0.0 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
| 8-bit | 0.0 GB | 0.0 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.
Model Card
By Datadog, published under apache-2.0, revision 8306a9801cf9.
Toto (Time Series Optimized Transformer for Observability) is a family of time series foundation models for multivariate forecasting developed by Datadog. Toto 2.0 is the current generation, featuring u-μP-scaled transformers ranging from 4m to 2.5B parameters, all trained from a single recipe. Forecast quality improves reliably with parameter count across the family.
The family sets a new state of the art on three forecasting benchmarks: BOOM, our observability benchmark; GIFT-Eval, the standard general-purpose benchmark; and the recent contamination-resistant TIME benchmark.
Performance
Quick Start
Inference code is available on GitHub.
Installation
pip install toto-models
Inference Example
Identity and Version
- Repository
- Datadog/Toto-2.0-4m
- Publisher
- Datadog
- Task
- Time series forecasting
- Modality
- Time series
- Library
- pytorch
- Parameters
- 4M parameters
- Languages
- Not stated by the source
- Revision
- 8306a9801cf98c0f5ffe4b2dcc8f496e616d84d9
- First published
- 2026-04-14
- Last updated
- 2026-06-04
Files and Weights
7 files, 17.7 MB in total. The weights are 1 file totalling 16.6 MB in safetensors.
Every file
| File | Type | Size | SHA-256 |
|---|---|---|---|
| model.safetensors | Weights | 16.6 MB | 316660d5afb4 |
| config.json | Configuration | 592 B | — |
| README.md | Documentation | 7.3 KB | — |
| assets/architecture.png | Other | 436.7 KB | 973196289f60 |
| assets/pareto.png | Other | 302.2 KB | 756a05902735 |
| figures/architecture.png | Other | 396.1 KB | d17a304f234c |
| .gitattributes | Repository | 1.7 KB | — |
License and Download
- License
- apache-2.0
- Access
- Open weights, no gate
- Download size
- 16.6 MB
Released by Datadog through its official repository on Hugging Face. Read the license.
Built From
- Described by arXiv:2602.12147
- Described by arXiv:2605.20119
Evaluations
Each result is shown as reported, with the conditions its reporter stated. None is a SAVRN measurement. A comparison lines two results up only when their configuration, unit and setup are all stated and identical.
| Benchmark | Conditions | Result | Reported by | Revision | Date |
|---|---|---|---|---|---|
| BOOM | Task time-series-forecastingMetric CRPSComparison conditions not established | 0.377 | Datadog Publisher reported |
Evaluated revision not stated | — |
| BOOM | Task time-series-forecastingMetric MASEComparison conditions not established | 0.624 | Datadog Publisher reported |
Evaluated revision not stated | — |
| GIFT-Eval | Task time-series-forecastingMetric CRPSComparison conditions not established | 0.524 | Datadog Publisher reported |
Evaluated revision not stated | — |
| GIFT-Eval | Task time-series-forecastingMetric MASEComparison conditions not established | 0.757 | Datadog Publisher reported |
Evaluated revision not stated | — |
| TIME | Task time-series-forecastingMetric CRPSComparison conditions not established | 0.574 | Datadog Publisher reported |
Evaluated revision not stated | — |
| TIME | Task time-series-forecastingMetric MASEComparison conditions not established | 0.689 | Datadog Publisher reported |
Evaluated revision not stated | — |
Memory Requirements
| Precision | Weights in memory |
|---|---|
| As published | 16.6 MB |
| 16-bit | 0.0 GB |
| 8-bit | 0.0 GB |
| 4-bit | 0.0 GB |
Weights only, from the published parameter count; the key-value cache and runtime add to this.
Compare Toto-2.0-4m
Questions About Toto-2.0-4m
How much GPU memory does Toto-2.0-4m need?
About 0 GB at 16-bit and 0 GB at 4-bit: the weights (4M parameters) plus a working margin. A long context needs more.
What is the cheapest GPU to run Toto-2.0-4m 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 Toto-2.0-4m commercially?
Yes. Toto-2.0-4m 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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