transformers safetensors llama text-generation sparse chat conversational dataset:cerebras/SlimPajama-627B dataset:HuggingFaceH4/ultrachat_200k arxiv:2405.03594 arxiv:2009.03300 arxiv:1905.07830 arxiv:1907.10641 arxiv:1911.01547 arxiv:2109.07958 arxiv:2110.14168 arxiv:2107.03374 arxiv:2310.06927 base_model:neuralmagic/Llama-2-7b-pruned50-retrained base_model:finetune:neuralmagic/Llama-2-7b-pruned50-retrained autotrain_compatible text-generation-inference endpoints_compatible region:us