gguf quantized 2-bit 3-bit 4-bit 5-bit 6-bit 8-bit GGUF text-generation base_model:MaziyarPanahi/calme-2.1-llama3.1-70b base_model:quantized:MaziyarPanahi/calme-2.1-llama3.1-70b region:us imatrix conversational