Weather and climate

Ai2 ACE2 (климатический эмулятор)

A fast climate model emulator: simulates the atmosphere years and decades ahead on a single GPU. Coupled with an ocean model (SamudrACE) for long-term scenarios.

Developer
Allen Institute for AI (Ai2), USA
First release
Nov 2024
Latest release
Aug 2026
Sizes
checkpoint of about 1.8 GB
License
Commercial use allowedApache 2.0
Running
On your own serverNeeds a GPU
Industries
Science and research, Finance, Public sector
Deploy on your server Hugging Face GitHub

What it does

  • Decades-long climate scenarios to assess long-term asset risks
  • Large-scale what-if runs on temperature and precipitation
  • Preparing data for crop yield and energy demand models

Where it is used

Insurance and reinsuranceReal estate development and infrastructureResearch and industry institutes

Hardware requirements

LaptopLaptop or regular PC, up to 8 GB of VRAM — smaller versions
no versions
1 GPUOne GPU with 16–80 GB — mid-size versions
fits
ClusterServer with several GPUs — flagship versions
no versions

Versions

  1. SamudrACE-E3SMv3
  2. ACE2S-SHiELD-plus
  3. SamudrACE (атмосфера + океан)
  4. ACE2-EAMv3
  5. ACE2-ERA5

How to run it

On your own serverWeights are downloaded from Hugging Face and served with vLLM (load and API) or llama.cpp (modest hardware). The model then runs in a closed network with no per-request fees.Hugging Face
How much hardware you needCalculate the VRAM for the model size, context length and number of concurrent requests.Open the hardware calculator

I can set this up end to end: pick the model size, deploy it on your server and connect it to your systems.

Frequently asked questions

Can Ai2 ACE2 (климатический эмулятор) be used in a commercial project?

Yes. License: Apache 2.0. It allows commercial use, but it is still worth having a lawyer review the license before launch.

What hardware does Ai2 ACE2 (климатический эмулятор) need?

At minimum: One GPU with 16–80 GB — mid-size versions. Without a GPU the model is not practical. You can calculate the exact VRAM for your model size and context in the hardware calculator.

Does Ai2 ACE2 (климатический эмулятор) support Russian?

Language does not matter for this model: it does not work with text.

Where can I download Ai2 ACE2 (климатический эмулятор) and what does it cost?

The Ai2 ACE2 (климатический эмулятор) weights are open and free to download. You only pay for the hardware it runs on and for the setup. Source links are at the bottom of this page.

How I deploy it for clients

  1. SelectionI pick the model size for your task and hardware and test it on your examples.
  2. DeploymentI deploy it on your server or in a closed network and provide an API.
  3. Fine-tuningI fine-tune it on your data (LoRA) or connect a knowledge base — whichever is cheaper for the task.
  4. IntegrationI connect it to your CRM, ERP, bot, website or team chat and set up monitoring.

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Details

Source: huggingface.co/api/models?author=allenai&search=ACE. Data checked against the model card on 22 Sep 2026. Have a lawyer review the license before commercial launch.