transformers gguf nvidia llama3.1 text-generation en dataset:nvidia/HelpSteer2 arxiv:2410.01257 arxiv:2405.01481 arxiv:2406.08673 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