ECMWF is now running its own Artificial Intelligence Forecasting System (AIFS). The AIFS consists of a deterministic model and an ensemble model. The deterministic model has been running operationally since 25 February 2025; further details can be found on the dedicated Implementation of AIFS Single v1 page. The ensemble model has been running operationally since 1 July 2025; further details can be found on the dedicated Implementation of AIFS ENS page.
Use of the AIFS deterministic and ensemble model output is governed by the Creative Commons CC-4.0-BY licence and the ECMWF Terms of Use. This means that the data may be redistributed and used commercially, subject to appropriate attribution.
Output data are provided in GRIB2 format with WMO units.
How to access deterministic model data
Dissemination
Real-time data from the AIFS deterministic model are available via dissemination.
Users can add these products to their data flows in the Product Requirements Editor by specifying "class=ai". A list of configurable parameters is provided in ECMWF's shopping cart tool, under GROUP D: AIFS.
Please note:
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These products are provided with a new file naming convention.
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These products are available according to the following dissemination schedule.
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These products are available with Pre-Schedule Delivery for eligible users.
Open data
Real-time open data are released as soon as the forecast is produced. The 1 hour delay has been removed following operational implementation of AIFS Single v1 on 25 February 2025.
The data are freely available to the user community. For more information on accessing these products, please see the open data user documentation or visit the ECMWF Support Portal. Open data from the IFS model are also publicly available; see https://www.ecmwf.int/en/forecasts/datasets/open-data for further information.
Graphical products
Graphical products are available as part of the charts catalogue and the ecCharts application. If the products are not found, please reload the page.
Archive data via MARS
Historical AIFS Single and Ensemble data are available in ECMWF's Archive and MARS catalogues. Users must be registered for archive access. The AIFS single data exists from February 2024 onwards, while the AIFS Ensemble data exists from July 2025 onwards.
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AIFS Single data in the Archive catalogue
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AIFS Single data in the MARS catalogue (restricted)
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AIFS Ensemble data in the Archive catalogue
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AIFS Ensemble data in the MARS catalogue (restricted)
Graphical products
Experimental graphical products can be accessed in the charts catalogue and the ecCharts application.
If the products are not found, please reload the page.
Available Products
Deterministic and ensemble model
The output of the AIFS deterministic and ensemble model is forecast with 6-hourly time steps out to 15 days initialised from the ECMWF operational analysis. Forecasts are produced four times per day (00/06/12/18UTC).
All forecasts are produced on an approximately 0.25 x 0.25-degree grid (N320 grid). Open data for the AIFS is disseminated on a regular 0.25 x 0.25-degree grid.
A full list of available products output by the AIFS Single and Ensemble models is available on the dataset description pages for AIFS Single and AIFS Ensemble.