What was the name of the 'new Mughal capital' during Shah Jahan's rule?

Shahjahanabad

In 1648 the court, army and household moved from Agra to the newly completed imperial capital, Shahjahanabad. It was a new addition to the old residential city of Delhi, with the Red Fort, the Jama Masjid, a tree-lined esplanade with bazaars (Chandni Chowk) and spacious homes for the nobility. Shah Jahan’s new city was appropriate to a more formal vision of a grand monarchy.