# Nemotron 3 Ultra 550B A55B Base BF16

Nemotron 3 Ultra 550B A55B Base BF16 is a model from NVIDIA with open weights, first recorded on 11 Nov 2026; its release date is not established.

- Developer: NVIDIA
- Id: nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16
- Sighting: 2026-11-11T10:11:44.400Z
  - [evidence link](https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16)
- Status: Released
- Weights version: 2026-06-03
  - [evidence link](https://huggingface.co/api/models/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16/paths-info/9f5b80e4845884eb8da03353b0b176503631e034)
- Canonical: https://alexgetman.com/models/nvidia/nvidia-nemotron-3-ultra-550b-a55b-base-bf16/

## Questions

### Are the weights of Nemotron 3 Ultra 550B A55B Base BF16 publicly available?

Yes. NVIDIA publishes the weights.

### When was Nemotron 3 Ultra 550B A55B Base BF16 released?

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

## Evidence links

- [hf-author-artifacts:nvidia](https://huggingface.co/api/models/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16/paths-info/9f5b80e4845884eb8da03353b0b176503631e034)
- [huggingface:nvidia](https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16)

## Signals