gguf ggml quantized q2_k q3_k_m q4_k_m q5_k_m q6_k q8_0 text-generation base_model:anilbhatt1/phi2-oasst-guanaco-bf16-custom base_model:quantized:anilbhatt1/phi2-oasst-guanaco-bf16-custom license:mit region:us