According to this documentation from Insomniac that leaked
This is dated from this november
What Hacked Files Tell Us About The Studio Behind Spider-Man 2
Internal documents show how a big PlayStation studio plans its future
kotaku.com
This is dated from this november
Business plans change, and Sony would not confirm if the discussed cuts are still on the table or already completed. But a notes file referencing a November 9 PlayStation off-site meeting reiterates the 50-75 number of cuts. The notes suggest the cuts are being asked of other PlayStation studios as well, including the line "there will be one studio closure." Sony did not respond when asked to clarify.