# ACE2S SHiELD Plus Supplemental Checkpoints

ACE2S SHiELD Plus Supplemental Checkpoints is a model from Ai2 with open weights, first recorded on 1 Nov 2026; its release date is not established.

- Developer: Ai2
- Id: allenai/ACE2S-SHiELD-plus-supplemental-checkpoints
- Sighting: 2026-11-01T18:24:27.355Z
  - [evidence link](https://huggingface.co/allenai/ACE2S-SHiELD-plus-supplemental-checkpoints)
- Status: Released
- Weights version: 2026-09-01
  - [evidence link](https://huggingface.co/api/models/allenai/ACE2S-SHiELD-plus-supplemental-checkpoints/paths-info/bfa46e87892c776f039201ce8abffb5cf1356219)
- Canonical: https://alexgetman.com/models/ai2/ace2s-shield-plus-supplemental-checkpoints/

## Questions

### Are the weights of ACE2S SHiELD Plus Supplemental Checkpoints publicly available?

Yes. Ai2 publishes the weights.

### When was ACE2S SHiELD Plus Supplemental Checkpoints released?

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

## Evidence links

- [huggingface:allenai](https://huggingface.co/allenai/ACE2S-SHiELD-plus-supplemental-checkpoints)
- [hf-author-artifacts:allenai](https://huggingface.co/api/models/allenai/ACE2S-SHiELD-plus-supplemental-checkpoints/paths-info/bfa46e87892c776f039201ce8abffb5cf1356219)

## Signals