transformers safetensors llama text-generation llama-factory orpo conversational en zh dataset:hiyouga/DPO-En-Zh-20k arxiv:2403.07691 base_model:meta-llama/Meta-Llama-3-8B-Instruct base_model:quantized:meta-llama/Meta-Llama-3-8B-Instruct license:other autotrain_compatible text-generation-inference endpoints_compatible 8-bit exl2 region:us