After falling into the black hole, Cooper continues to record what he's seeing and transmits it back to TARS, hoping the additional data might help the scientists back on Earth. Although he expects to eventually get crushed by Gargantua's gravity, Cooper is miraculously spared once his shuttle is ripped apart.

Does Cooper from interstellar die?

Ben Kendrick writes of the near-end of Interstellar: When Cooper sacrifices himself to ensure Plan B, he is caught in the black hole's gravitational pull but, instead of dying, ejects from his ship -- landing, as previously mentioned, inside The Tesseract (aka the wormhole's gravitational singularity).

Who saved Cooper in interstellar?

The two men fought as the cowardly Mann broke Cooper's helmet visor which would cause him to suffocate and die. He was able to call Amelia to come and save him then pursue Mann to the Endurance after recovering TARS from the compound.