The sixth season of “Game of Thrones,” beginning April 24, might be the show’s last full-length one, if the creators get their way.

Seasons of the sprawling HBO fantasy epic have traditionally included 10 episodes, but David Benioff and Dan Weiss, the creators of “Game of Thrones,” said in an interview with Variety that they are considering wrapping up the series with two abbreviated seasons that amount to a total of 13 episodes.

“I think we’re down to our final 13 episodes after this season,” Mr. Benioff said. “We’re heading into the final lap. That’s the guess, though nothing is yet set in stone, but that’s what we’re looking at.”

The trimmed schedule would include seven episodes next season, and six in an eighth and final one. HBO countered that “any conversations about the end of ‘Game of Thrones’ and the number of episodes of future seasons is purely speculative.”