TiRex-2: Generalizing TiRex to Multivariate Data and Streaming

This repository provides the pre-trained multivariate forecasting model TiRex-2 introduced in the paper TiRex-2: Generalizing TiRex to Multivariate Data and Streaming.

TiRex-2 PRO: This repository is our open-source release. TiRex-2 PRO extends it with dedicated support, streaming, hardware-optimized inference (edge, embedded, and industrial PCs, among others), fine-tuning, and classification & regression support — see TiRex-2 PRO below or contact us at contact@nx-ai.com.

TiRex-2

TiRex-2 is a pretrained time series foundation model that forecasts one or many target variates directly from their history, optionally conditioned on past and future-known covariates. A single checkpoint serves both univariate and multivariate forecasting, built on a recurrent architecture designed for efficient streaming settings — all zero-shot, with no task-specific training or fine-tuning.

TiRex-2 generalizes our original univariate model, TiRex, to multivariate forecasting with past and future covariates.

Key facts

• Zero-shot multivariate forecasting: TiRex-2 forecasts multiple target variates out of the box, without training or fine-tuning on your data.

• Past and future-known covariates: TiRex-2 natively conditions on past covariates and future-known covariates, such as calendar features, holidays, promotions, or scheduled interventions.

• Small active footprint: TiRex-2 activates 38.4M parameters in univariate mode and an additional 44.1M parameters for multivariate forecasting.

Installation

Via Pip

pip install tirex-2

Install with additional dependencies:

pip install "tirex-2[examples,fev,gluonts]"

The Python package installation is currently only tested on Linux and macOS. Docker usage is documented separately and includes Linux, macOS, and Windows Docker Desktop instructions.

Via Pixi

We use Pixi for our development and benchmarking environment to ensure that it is set up correctly. Run the following command to install it on your machine (Linux/macOS):

# install Pixi
curl -fsSL https://pixi.sh/install.sh | sh
# install dependencies for TiRex-2
pixi install

Pixi selects a compatible platform automatically (PyTorch w/ CUDA 13.0 for Linux/Windows, PyTorch w/ default for macOS), or you can choose one explicitly, for example -p linux-64-cuda-126. Both environments and platforms are defined in pyproject.toml.

FAQ

See the FAQ in the documentation.

Getting started

The most easy way for you to get started is by checking out our "Getting Started" notebook. Moreover, you can jump straight into testing out TiRex using Google Colab. If you have cloned this repository, you can also easily start the notebook via Pixi by running:

pixi run notebook

Minimal usage predicting a simple sine wave

import torch
from tirex2 import TimeseriesType, load_model
from tirex2.plotting import plot_multivariate  # requires matplotlib to be installed

# load model
model = load_model("NX-AI/TiRex-2", device="cpu")  # use `device="cuda"` if cuda is available

# generate data - target expects time series of shape (n_targets, context_length)
context = torch.sin(torch.arange(128).float() / 8)
ts = TimeseriesType(target=context.unsqueeze(0), past_covariates=None, future_covariates=None)

# perform forecast - each forecast is of shape (n_targets, 9 quantiles, prediction_length)
forecast = model.forecast([ts], prediction_length=32, output_type="numpy")[0]

# visualize result
fig = plot_multivariate(ts, forecast, engine="matplotlib")
fig.show()

Covariate example

This example originates from the "Getting Started" notebook, showing the value of additional covariates.

from tirex2 import load_model
from tirex2.demo import Demo, plot_demo_forecast

# load model
model = load_model("NX-AI/TiRex-2", device="cpu")  # use `device="cuda"` if cuda is available

# load data
demo = Demo.create_nonstationary_demo()
ts_univariate = demo.to_timeseries_type(include_covariates=False)
ts_multivariate = demo.to_timeseries_type(include_covariates=True)

# perform forecast - each forecast is of shape (n_targets, 9 quantiles, prediction_length)
forecasts = model.forecast(
    timeseries=[ts_univariate, ts_multivariate],
    prediction_length=demo.horizon,
    output_type="numpy",
)

# visualize result
fig = plot_demo_forecast(demo, *forecasts, engine="matplotlib")
fig.show()

Benchmarking

To reproduce our results for the GIFT-Eval and fev-bench leaderboards, follow the instructions in /examples/gifteval/ and /examples/fevbench/, respectively.

TiRex Docker image

For detailed instructions on building and running TiRex-2 in a Docker container, see the Docker README.

TiRex-2 PRO

TiRex-2 already provides state-of-the-art performance for zero-shot prediction, so you can use this open-source release without training on your own data.

TiRex-2 PRO extends this open-source release with:

• Support: dedicated support and engagement from NXAI.
• Streaming: incremental forecast updates as new observations arrive, without recomputing forecasts over the full history.
• Speed: optimized inference, including hardware-specific optimizations for edge, embedded, and industrial PC deployments.
• Fine-tuning: models adapted to your data or pretrained on different datasets for improved performance.
• Classification & Regression: TiRex-2 adapted for classification and regression tasks.

See the full feature comparison in the docs, or contact us at contact@nx-ai.com.

Cite

If you use TiRex in your research, please cite our work:

@misc{podest2026tirex2generalizingtirexmultivariate,
      title={TiRex-2: Generalizing TiRex to Multivariate Data and Streaming},
      author={Patrick Podest and Marco Pichler and Elias Bürger and Levente Zólyomi and Bernhard Voggenberger and Wilhelm Berghammer and Daniel Klotz and Sebastian Böck and Günter Klambauer and Sepp Hochreiter},
      year={2026},
      eprint={2607.01204},
      archivePrefix={arXiv},
      primaryClass={cs.LG},
      url={https://arxiv.org/abs/2607.01204},
}

Intended use and limitations

This release supports time-series forecasting as documented. High-risk applications under EU AI Act Article 6 are outside NXAI's intended purpose. NXAI has not validated this release for high-risk compliance. Users and integrators must assess suitability and meet their legal obligations. Unlawful uses, including those prohibited by EU AI Act Article 5, are not permitted. See the Intended Use Notice for details. It does not change the licence or statutory obligations.

License

TiRex-2 is licensed under the Apache License 2.0.