gguf quantized 2-bit 3-bit 4-bit 5-bit 6-bit 8-bit GGUF text-generation base_model:Orion-zhen/Qwen2.5-7B-Instruct-Uncensored base_model:quantized:Orion-zhen/Qwen2.5-7B-Instruct-Uncensored region:us imatrix conversational