transformers pytorch opt text-generation deepspeed chatgpt sft en dataset:Dahoas/full-hh-rlhf dataset:Dahoas/synthetic-instruct-gptj-pairwise dataset:yitingxie/rlhf-reward-datasets dataset:openai/webgpt_comparisons dataset:stanfordnlp/SHP license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible region:us