transformers safetensors llava pretraining multimodal lmm vlm siglip llama3 mantis en dataset:TIGER-Lab/Mantis-Instruct arxiv:2405.01483 base_model:TIGER-Lab/Mantis-8B-siglip-llama3-pretraind base_model:finetune:TIGER-Lab/Mantis-8B-siglip-llama3-pretraind license:llama3 endpoints_compatible region:us