transformers gguf quantized 2-bit 3-bit 4-bit 5-bit 6-bit 8-bit 16-bit GGUF mixtral moe text-generation en base_model:mistral-community/Mixtral-8x22B-v0.1 base_model:quantized:mistral-community/Mixtral-8x22B-v0.1 license:apache-2.0 region:us