peft NeurIPS NeurIPS LLM Efficiency Challenge NeurIPS LLM Efficiency Challenge Winner Model Team Upaya en dataset:upaya07/NeurIPS-LLM-data base_model:mistralai/Mistral-7B-v0.1 base_model:adapter:mistralai/Mistral-7B-v0.1 license:apache-2.0 model-index region:us