During the design process, great priority was placed on facilitating and minimizing aircraft maintenance; in addition to a maintenance-friendly layout, many subsystems and components require little or no maintenance at all. [...] According to Saab, the Gripen provides "50% lower operating costs than its best competitor".
A 2012 Jane's Aerospace and Defense Consulting study compared the operational costs of a number of modern combat aircraft, concluding that Gripen had the lowest cost per flight hour (CPFH) when fuel used, pre-flight preparation and repair, and scheduled airfield-level maintenance together with associated personnel costs were combined. The Gripen had an estimated CPFH of US$4,700 whereas the next lowest, the F-16 Block 40/50, had a 49% higher CPFH at $7,000
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It's not quite that simple. Regarding the Gripen:
https://en.wikipedia.org/wiki/Saab_JAS_39_Gripen#Usability_a...
I'll admit I don't know all the ins and outs here, but I do know that "unit cost" is not the same as "final price tag".
and F-35 is probably around $30k/h
It's at 33k/h right now.
So, given usually life of aircraft is around 10k hours, difference between 5k and 33k is very large: 10000*(33000-5000) = 280M