# Longformer Base 4096

Longformer Base 4096 is a model from Ai2 with open weights, first recorded on 11 Nov 2026; its release date is not established.

- Developer: Ai2
- Id: allenai/longformer-base-4096
- Sighting: 2026-11-11T22:44:54.722Z
  - [evidence link](https://huggingface.co/allenai/longformer-base-4096)
- Status: Released
- Weights version: 2020-08-05
  - [evidence link](https://huggingface.co/api/models/allenai/longformer-base-4096/paths-info/301e6a42cb0d9976a6d6a26a079fef81c18aa895)
- Canonical: https://alexgetman.com/models/ai2/longformer-base-4096/

## Questions

### Are the weights of Longformer Base 4096 publicly available?

Yes. Ai2 publishes the weights.

### When was Longformer Base 4096 released?

Its release date is not established. Signal Forge first recorded it on 11 Nov 2026.

## Evidence links

- [huggingface:allenai](https://huggingface.co/allenai/longformer-base-4096)
- [hf-author-artifacts:allenai](https://huggingface.co/api/models/allenai/longformer-base-4096/paths-info/301e6a42cb0d9976a6d6a26a079fef81c18aa895)

## Signals