transformers safetensors llama text-generation conversational en dataset:allenai/tulu-2.5-preference-data dataset:allenai/tulu-v2-sft-mixture arxiv:2406.09279 base_model:allenai/tulu-2-7b base_model:finetune:allenai/tulu-2-7b license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible region:us