Reached by email on Friday, Mr. Glass said he also planned to repay other outlets — a total that, by some estimates, could run into the hundreds of thousands of dollars. He declined to comment further.

Mr. Glass was a rising star in journalism in the late 1990s, known for vivid features at The New Republic, where he was an associate editor, and other magazines. His work included an article in the February 1998 issue of Harper’s about his experiences becoming a phone-in psychic.

Later that year, after an editor at the website Forbes Digital Tool raised questions about one of his articles about computer hackers, he was revealed as a serial fabricator. The New Republic said that some of his articles were completely made up, while others were partly so. The story of his fabrications, and their uncovering, was made into a 2003 movie, “Shattered Glass.”