Spouse is on a 6-month extension (pending I-765 processing related to a I-485 application) of his expired F-1 OPT. Is he considered a resident or nonres alien for taxes?

came to US in 2013 on F-1. Converted to 1-year OPT after degree. Filed I-765 after marriage with I-485. Received 6 month extension of current EAD (OPT) based on pending I-765