transformers safetensors qwen text-generation custom_code zh en arxiv:2309.16609 arxiv:2305.08322 arxiv:2009.03300 arxiv:2305.05280 arxiv:2210.03629 base_model:Qwen/Qwen-14B-Chat base_model:quantized:Qwen/Qwen-14B-Chat autotrain_compatible 4-bit awq region:us