To check which model version is currently being used, the grib key generatingProcessIdentifier can be reviewed:

grib_dump -OH <AIFS_file.grib2> | grep generatingProcessIdentifier

For example, looking at the AIFS ENS data that is available via the open data platform:

$ grib_dump -OH 20250912060000-0h-enfo-cf.grib2| grep generatingProcessIdentifier  

14        generatingProcessIdentifier = 1 ( 0x01 )

In this example, generatingProcessIdentifier = 1 corresponds to the model AIFS ENS v1.



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