Preload data for GTA 6 shows the PlayStation 5 Pro supports a new PSSR 2 upscaler version 13.60, higher than the 13.00 version in previous games, according to Wccftech. The data also indicates a "120hz / High Framerate mode" with no VRR, suggesting a possible 40 FPS setting on the Pro.
Notebookcheck reports the base PlayStation 5 likely lacks QSSR support, which was introduced in October, while the Pro's PSSR 2 update could enhance visuals. Rockstar North co-lead Rob Nelson mentioned developers aim for 30 FPS on launch, but a 40 FPS/120Hz mode remains possible for the Pro.