Paraphrased:"I have seen the best hearts of my generation destroyed by madness and hysterically naked and hungry, Going through Negro Street at dawn, looking for a ferocious solution, An angel-headed hipster, burning on a machine at night, after an ancient celestial connection to a dynamo in the starry sky. In the supernatural darkness of a cold-water apartment floating on the roof of the city thinking of jazz, a poor, tattered, dented eye smoker"
Original:" I saw the best minds of my generation destroyed by madness, starving hysterical naked, dragging themselves through the negro streets at dawn looking for an angry fix, angelheaded hipsters burning for the ancient heavenly connection to the starry dynamo in the machinery of night, who poverty and tatters and hollow-eyed and high sat up smoking in the supernatural darkness of cold-water flats floating across the tops of cities contemplating jazz"
I was expecting basically thesaurus substitutions, and that is mainly what it did. However, there was some amount of sentence reordering as well. Not sure this would pass plagiarism detection tools though. However, I chose something specifically difficult to paraphrase, and honestly the results aren't bad.