transformers safetensors gpt_neox text-generation alignment-handbook trl sft generated_from_trainer conversational dataset:allenai/tulu-v2-sft-mixture base_model:EleutherAI/pythia-70m base_model:finetune:EleutherAI/pythia-70m license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible region:us