If you have more than 12 hrs of transit then you will get a free hotel accommodation. If it is less than that you will get only a meal voucher at the airport.

I traveled to  Nepal on August, while going it was 8 hrs transit so only food voucher was available but while returning it was 13 hrs transit so they provided a 5 star hotel with complementary dinner and breakfast buffet. I returned in November 2009, i think nothing has changed since then.