sentence-transformers safetensors mega feature-extraction sentence-similarity transformers 16k efficient attention en dataset:pszemraj/synthetic-text-similarity base_model:BEE-spoke-data/mega-encoder-small-16k-v1 base_model:finetune:BEE-spoke-data/mega-encoder-small-16k-v1 license:artistic-2.0 autotrain_compatible endpoints_compatible region:us