No, around 18 mins as far as I can remember. That 5 hours value is for the TB2 that monitored the first flight.
P.S. planes usually don't stay in the air for that long in first flights so it'd very unusual for them to do so.
First flights are usually done to prove that the aircraft is airworthy and can do basic maneuvers.
You may counter by saying that Baykar is not like other companies and they work differently but even in the first flight of Akinci, it didn't stay in the air for long.
Anyway, and there's already the second prototype