# AIFS V3 Fields and Levels?

**URL:** <https://forum.ecmwf.int/t/aifs-v3-fields-and-levels/15279>\
**Category:** AIFS\
**Created:** [24 August 2026 12:34 UTC](https://forum.ecmwf.int/t/aifs-v3-fields-and-levels/15279 "2026-08-24T12:34:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Jamie\_Ray](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/j/c37758/32.png) [@Jamie\_Ray](https://forum.ecmwf.int/u/Jamie_Ray)\
**Post date:** [24 August 2026 12:34 UTC](https://forum.ecmwf.int/t/aifs-v3-fields-and-levels/15279/1 "2026-08-24T12:34:24Z")

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I’m wondering if the fields / levels have been decided, and in that case what they are (and the diagnostic vs. prognostic breakdown). Thanks!