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Language model

Llama 3.3 Nemotron Super 49B v1.5

NVIDIA

Released
July 25, 2025
Data date
September 26, 2026

Llama 3.3 Nemotron Super 49B v1.5 is the documented revision of Llama 3.3 Nemotron Super 49B v1. The checkpoint remains at 49 billion parameters but ships with updated post-training and inference behavior.

Reasoning is enabled by default and can be disabled with the documented no-think switch. The 131,072-token window remains available for long agent runs. The v1.5 identifier marks a separate revised checkpoint that must stay distinct from v1 in evaluations.

Specifications and access

SpecificationValue and source
Weights
Open weightsSource
Access
Parameters
49 billionSource
Context window
131,072 tokensSource
Maximum output
131,072 tokensSource
License
NVIDIA Open Model LicenseSource
Inputs
TextSource
Outputs
TextSource
Reasoning
Tool calling