transformers pytorch llama text-generation conversational en dataset:openbmb/UltraFeedback arxiv:2404.16767 base_model:meta-llama/Meta-Llama-3-8B-Instruct base_model:finetune:meta-llama/Meta-Llama-3-8B-Instruct license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible region:us