weather
ECMWF AIFS (Single / ENS)
ECMWF AI forecasting system; AIFS Single operational end Feb 2025, AIFS ENS operational 1 Jul 2025, up to 20% gains over physics ENS on surface temperature.
Levelmodel
Classweather
Parametersnot in the notes
Contextnot in the notes
ReleasedFeb 2025
Opennessunknown
Runs onnot in the notes
Statusactive
Lineage
successor
AIFS v2 is a child (successor)medium confidencenotesWhere 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, 2 models. Confidence and evidence are the notes' own.
R&D Topics
Runtimes
Identity
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
- other Trained with open-source Anemoi framework; ENS 31 km
- Total parameters
- – sources
- Active parameters
- –
- Checkpoint parameters
- –
- Context length
- not in the notes
- Input
- sensor
- Output
- sensor
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
- unknown
- Licence
- not in the notes sources
- Access routes
- not in the notes
Where this comes from
The licence file governs over registry tags and aggregator labels.
Deployment
- Runs on
- not in the notes
- Footprint
- not in the notes
- Runtimes
- Anemoi
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.
Benchmark Results
The notes record no benchmark result for this model.
Industry Use Cases
No industry use case links this model.
Links
DeveloperECMWFgovernment, UK
ECMWFgovernment, UKModelECMWF AIFS (Single / ENS)ECMWF, weather
ECMWF AIFS (Single / ENS)ECMWF, weatherR&D TopicsProbabilistic Ensemble Weather Forecasting with Machine LearningMachine-Learning Medium-Range Weather Forecasting
Use CasesWeather ForecastingAgricultureUse cases of models in the same R&D topic; none is recorded for this model itself.
Who Runs It
Badan Meteorologi, Klimatologi, dan Geofisika (BMKG)Contract signed, 5 Feb 2026Badan Meteorologi, Klimatologi, dan Geofisika (BMKG)In production, 23 Sep 2025Deployments of these use cases; none names this model.
Badan Meteorologi, Klimatologi, dan Geofisika (BMKG)Contract signed, 5 Feb 2026Badan Meteorologi, Klimatologi, dan Geofisika (BMKG)In production, 23 Sep 2025Deployments of these use cases; none names this model.Models 1
Organisations 1
R&D topics 2
Machine-Learning Medium-Range Weather ForecastingGlobal forecast models learned from reanalysis data that predict the next 10 to 15 days m…exemplarProbabilistic Ensemble Weather Forecasting with Machine LearningMachine-learning models that produce many possible weather futures, giving forecast uncer…produced by
Sources
- ECMWF’s ensemble AI forecasts become operational ecmwf.int https://www.ecmwf.int/en/about/media-centre/news/2025/ecmwfs-ensemble-ai-forecasts-become-operational
- Implementation of AIFS v2 ecmwf.int https://www.ecmwf.int/en/newsletter/187/news/implementation-aifs-v2
To cite this page: Project AURION, AI Use-Cases Research & Innovation, "ECMWF AIFS (Single / ENS)", https://aurion.semai.id/models/ecmwf-aifs/, records of October 2026.