STS Benchmark comprises a selection of the English datasets used in the STS tasks organized in the context of SemEval between 2012 and 2017. The selection of datasets include text from image captions, news headlines and user forums. (source)
How to use this model from the sentence transformers library:
from sentence_transformers import SentenceTransformer
model = SentenceTransformer("abhijithneilabraham/stsb_multi_mt_distilbert-base-uncased")
Find the evaluation results here