gguf quantized 2-bit 3-bit 4-bit 5-bit 6-bit 8-bit GGUF text-generation en de fr it pt hi es th base_model:meta-llama/Llama-3.1-70B-Instruct base_model:quantized:meta-llama/Llama-3.1-70B-Instruct region:us imatrix conversational