# Llama 3.1 Nemotron Ultra 253B CPT V1

Llama 3.1 Nemotron Ultra 253B CPT V1 is a model from NVIDIA with open weights, first recorded on 11 Nov 2026; its release date is not established.

- Developer: NVIDIA
- Id: nvidia/Llama-3_1-Nemotron-Ultra-253B-CPT-v1
- Sighting: 2026-11-11T21:23:55.161Z
  - [evidence link](https://huggingface.co/nvidia/Llama-3_1-Nemotron-Ultra-253B-CPT-v1)
- Status: Released
- Weights version: 2025-04-08
  - [evidence link](https://huggingface.co/api/models/nvidia/Llama-3_1-Nemotron-Ultra-253B-CPT-v1/paths-info/00e37b5d4ed5e05618ed7ad1e445dfa446a47941)
- Canonical: https://alexgetman.com/models/nvidia/llama-3-1-nemotron-ultra-253b-cpt-v1/

## Questions

### Are the weights of Llama 3.1 Nemotron Ultra 253B CPT V1 publicly available?

Yes. NVIDIA publishes the weights.

### When was Llama 3.1 Nemotron Ultra 253B CPT V1 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/Llama-3_1-Nemotron-Ultra-253B-CPT-v1/paths-info/00e37b5d4ed5e05618ed7ad1e445dfa446a47941)
- [huggingface:nvidia](https://huggingface.co/nvidia/Llama-3_1-Nemotron-Ultra-253B-CPT-v1)

## Signals