transformers safetensors llama text-generation Riiid llama-2 en arxiv:2308.07317 arxiv:2306.02707 base_model:Riiid/sheep-duck-llama-2 base_model:quantized:Riiid/sheep-duck-llama-2 license:llama2 autotrain_compatible text-generation-inference 4-bit gptq region:us