transformers pytorch tensorboard gpt2 text-generation generated_from_trainer Transformers GPT2 en dataset:Anthropic/hh-rlhf dataset:hakurei/open-instruct-v1 base_model:vicgalle/gpt2-open-instruct-v1 base_model:finetune:vicgalle/gpt2-open-instruct-v1 license:mit autotrain_compatible text-generation-inference endpoints_compatible region:us