# ACE2 SHiELD

ACE2 SHiELD is a model from Ai2 with open weights, first recorded on 1 Nov 2026; its release date is not established.

- Developer: Ai2
- Id: allenai/ACE2-SHiELD
- Sighting: 2026-11-01T18:24:27.355Z
  - [evidence link](https://huggingface.co/allenai/ACE2-SHiELD)
- Status: Released
- Weights version: 2026-06-29
  - [evidence link](https://huggingface.co/api/models/allenai/ACE2-SHiELD/paths-info/13978196694ef4bb20d6f9ed94a83e697adda328)
- Canonical: https://alexgetman.com/models/ai2/ace2-shield/

## Questions

### Are the weights of ACE2 SHiELD publicly available?

Yes. Ai2 publishes the weights.

### When was ACE2 SHiELD released?

Its release date is not established. Signal Forge first recorded it on 1 Nov 2026.

## Evidence links

- [huggingface:allenai](https://huggingface.co/allenai/ACE2-SHiELD)
- [hf-author-artifacts:allenai](https://huggingface.co/api/models/allenai/ACE2-SHiELD/paths-info/13978196694ef4bb20d6f9ed94a83e697adda328)

## Signals