gguf quantized GGUF quantization imat imatrix static 16bit 8bit 6bit 5bit 4bit 3bit 2bit 1bit text-generation base_model:mattshumer/Reflection-Llama-3.1-70B base_model:quantized:mattshumer/Reflection-Llama-3.1-70B license:llama3.1 region:us