Model · Language model
Llama 3.1 Nemotron Ultra 253B
An ungated 253B text reasoning model with a DecILM sparse architecture, governed by the NVIDIA Open Model License over the Llama 3.1 base.
- Developer
- NVIDIA
- Distribution
- Downloadable weights · Developer API
- Artifact licensing
- Restricted artifact terms
- License scope
- Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.
- Licenses
- NVIDIA Open Model License · Llama 3.1 Community License · Llama 3.1 Acceptable Use Policy
- Boundary
- This record represents the nvidia/Llama-3_1-Nemotron-Ultra-253B-v1 v1.0 release dated April 7, 2025 at Hugging Face commit 5b47def5b8957142d82faeb44bfad9349d02840d. The 70B Instruct and Super siblings, downstream quantizations, the NVIDIA build.nvidia.com trial endpoint, and NIM packaging are separate model or service boundaries.
Risk statements
Not yet examined.
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