nemo gguf nvidia llama3.1 en dataset:nvidia/HelpSteer2 arxiv:2410.01257 arxiv:2406.08673 arxiv:2310.05344 arxiv:2311.09528 base_model:meta-llama/Llama-3.1-70B-Instruct base_model:quantized:meta-llama/Llama-3.1-70B-Instruct license:llama3.1 region:us conversational