# \#ai-ml-based-predictions

**URL:** https://forum.ecmwf.int/tag/ai-ml-based-predictions/136.md

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## [Does switching variables from prognostic to forcing necessitate training from scratch?](https://forum.ecmwf.int/t/does-switching-variables-from-prognostic-to-forcing-necessitate-training-from-scratch/14723)

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**Author:** [@Julian\_Schmitt](https://forum.ecmwf.int/u/Julian_Schmitt)\
**Replies:** 2\
**Last updated:** [6 April 2026 20:36 UTC](https://forum.ecmwf.int/t/does-switching-variables-from-prognostic-to-forcing-necessitate-training-from-scratch/14723 "2026-04-06T20:36:38Z")

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We are experimenting with changing some variables from prognostic to forcing. We are wondering if in changing the model architecture like this we are still able to fine-tune a current AIFS checkpoint or do we necessarily…

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## [Seeking architecture and training configuration advice for 1° model](https://forum.ecmwf.int/t/seeking-architecture-and-training-configuration-advice-for-1-model/14722)

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**Author:** [@Julian\_Schmitt](https://forum.ecmwf.int/u/Julian_Schmitt)\
**Replies:** 0\
**Last updated:** [12 February 2026 23:27 UTC](https://forum.ecmwf.int/t/seeking-architecture-and-training-configuration-advice-for-1-model/14722 "2026-02-12T23:27:51Z")

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We are training a 1° model (O96) from scratch on the provided 40 year ERA5 dataset using a slightly modified default configuration for MSE training. We have modified the following configuration arguments and trained an i…