Perhaps it's the units they are using to compare different bombs but the early hydrogen bombs were already many times more powerful than the Hiroshima bomb. The H bomb used in Operation Ivy was already reported to be 1000X more powerful than Hiroshima in terms of energy released. And that was 1952.
"Operation IVY
Ivy Mike TestThe first series of thermonuclear tests conducted by the United States took place in November 1952 during Operation IVY. The first test took place on November 1, 1952 on the small Pacific island of Elugelab at Enewetak Atoll in the Marshall Islands. The explosion, nicknamed the “Mike Shot”, was very successful. It yielded an energy equivalent of 10 megatons of TNT, an amount roughly 1000 times as large as that released by the Hiroshima bomb (some 13 kilotons) that was dropped on Japan in August 1945. Though the test proved successful, the Mike device was very far from being a practical deliverable weapon. Its thermonuclear fuel consisted of liquid deuterium, a substance which must be cooled to temperatures colder than -250 C in order to liquefy it. As a result, the bomb required a complex refrigerating device (the size of a small laboratory) in order to maintain the fuel in that condition prior to its being exploded."
https://ahf.nuclearmuseum.org/ahf/history/hydrogen-bomb-1950/
Some of those early bombs were too large to deploy as weapons.
Edited by KC rules at 13:53:16 on 10/30/23