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Ai2 releases HiRO-ACEv2, an updated climate emulator and 3 km downscaling system, under Apache 2.0
Ai2 announced HiRO-ACEv2 on October 14, 2026 as the newest update to its High Resolution Output Ai2 Climate Emulator system, pairing an updated ACE model with a new downscaling model, HiROv2. The model card describes HiROv2 as a diffusion model that generates 3 km precipitation, 10 m winds, and sea level pressure from coarse ACE output, and releases the ACE2S-X-SHiELD and HiROv2 checkpoints with inference configs under Apache 2.0 for research and educational use. The card says the model was not trained or tested outside 66S to 70N, is not expected to generalize to climates outside its 10-year training data, and that ACE2S-X-SHiELD is not suitable for weather forecasting. USASI has not tested this model.12
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USASI. (2026, October 16). Ai2 releases HiRO-ACEv2, an updated climate emulator and 3 km downscaling system, under Apache 2.0. United States of America Superintelligence. https://unitedstatesofamericasuperintelligence.com/news/ai2-releases-hiro-acev2-climate-downscaling-model/
BibTeX
@misc{usasi_news_ai2_releases_hiro_acev2_climate_downscaling_model,
author = {{USASI}},
title = {Ai2 releases HiRO-ACEv2, an updated climate emulator and 3 km downscaling system, under Apache 2.0},
year = {2026},
month = oct,
howpublished = {\url{https://unitedstatesofamericasuperintelligence.com/news/ai2-releases-hiro-acev2-climate-downscaling-model/}},
note = {United States of America Superintelligence. Last updated 2026-10-16}
}The date is when this page was last updated. Add the date you read it if your style needs one.