transformers gguf qwen qwen2.5 finetune dpo orpo qwen2 chat conversational instruct storywriting roleplay text-generation en dataset:jondurbin/gutenberg-dpo-v0.1 dataset:Qwen/Qwen2.5-14B-Instruct dataset:HuggingFaceH4/ultrafeedback_binarized arxiv:2403.19522 base_model:Qwen/Qwen2.5-14B-Instruct base_model:quantized:Qwen/Qwen2.5-14B-Instruct license:apache-2.0 endpoints_compatible region:us