https://huggingface.co/docs/transformers/model_doc/t5 is quite good for summarization!

I found an 'old' (2016) reddit thread describing how auto tldr works, which doesn't suffer from hallucination (because it's only a statistical model that outputs original sentences from the text):

https://old.reddit.com/r/askscience/comments/4s5b5q/how_exac...