transformers safetensors phi text-generation mergekit merge custom_code arxiv:2203.05482 base_model:Shaleen123/phi-2-4bits base_model:merge:Shaleen123/phi-2-4bits base_model:Shaleen123/phi-2-code base_model:merge:Shaleen123/phi-2-code base_model:Shaleen123/phi-2-maths base_model:merge:Shaleen123/phi-2-maths autotrain_compatible text-generation-inference endpoints_compatible 4-bit bitsandbytes region:us