Shamelessly copied and pasted from Autosport.com:
How will MotoGP sprint races work?
MotoGP sprint races will run to half of the total distance of the main grand prix. So, for example, the British Grand Prix at Silverstone consisted of 20 laps: therefore, the sprint race will be run over 10 laps.
To accommodate the sprint race, weekend's format will be altered slightly. Two practice sessions will continue to take place on Friday, but will be extended. It is not clear yet how long FP1 and FP2 will now be, however the new format will ensure actual weekend track time remains unchanged from 2022. This will also mean tyre and engine allocations won’t be altered.
The combined standings at the end of FP2 will determine who goes through into the first qualifying session and who goes directly through to the pole shootout session.
On Saturday morning, a 30-minute FP3 session will take place ahead of qualifying – with the current FP4 session essentially being replaced by the new FP3 session.
Qualifying will remain unchanged from the format that has been used since 2013, with the results from it decided the grid for both the sprint and the grand prix.
The 20-minute warm-up will be removed from Sunday’s schedule.
Half points will be awarded to riders in the top nine positions of the sprint races.
In a normal grand prix, the top 15 riders score points in a system of: 25, 20, 16, 13, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1
In the sprint race, the winner will score 12 points, with the remaining eight positions down to ninth scoring 9, 7, 6, 5, 4, 3, 2, 1.