# Longformer Base 4096 Extra.pos.embd.only

Longformer Base 4096 Extra.pos.embd.only 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-extra.pos.embd.only
- Sighting: 2026-11-11T23:56:45.080Z
  - [evidence link](https://huggingface.co/allenai/longformer-base-4096-extra.pos.embd.only)
- Status: Released
- Weights version: 2020-08-07
  - [evidence link](https://huggingface.co/api/models/allenai/longformer-base-4096-extra.pos.embd.only/paths-info/fa20d443b7a87e01c4df28d890ece6cd9682e048)
- Canonical: https://alexgetman.com/models/ai2/longformer-base-4096-extra-pos-embd-only/

## Questions

### Are the weights of Longformer Base 4096 Extra.pos.embd.only publicly available?

Yes. Ai2 publishes the weights.

### When was Longformer Base 4096 Extra.pos.embd.only 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-extra.pos.embd.only)
- [hf-author-artifacts:allenai](https://huggingface.co/api/models/allenai/longformer-base-4096-extra.pos.embd.only/paths-info/fa20d443b7a87e01c4df28d890ece6cd9682e048)

## Signals