Microsoft’s developer documentation adds a useful piece of context: FSR Upscaling 4.1.2 is already documented for Xbox Series X|S in the October 2026 Game Development Kit. That makes it a genuine option for developers—not proof that Rockstar has selected it for GTA VI.
What the Xbox files actually reveal
According to GTA Playbook’s account of metadata posted by dataminer Tex2, the Xbox package lists two particularly interesting files:
amd_fidelityfx_loader_xbox.dllamd_fidelityfx_upscaler_xbox.dll
GTA Playbook attributes the FSR interpretation to InfoXbox, while emphasizing that the listing supplies neither a version number nor evidence that gameplay invokes those libraries. InfoXbox also reportedly said the encrypted files prevented identification of the FSR version. These are clues about the graphics integration, not a Rockstar announcement.
That leaves Notebookcheck’s proposed FSR 4.1 launch support or later upgrade in the realm of possibility. Its suggestion that a post-launch update would make sense should not be mistaken for a disclosed development plan. There is no confirmed update schedule in that report.
Microsoft’s sample explains why filenames aren’t enough
The strongest technical contribution comes from Microsoft’s own FSR sample documentation. Its Xbox integration can switch between FSR 4 Full, FSR 4 Lite and FSR 3, and it queries the running version separately. In other words, even an integration demonstrating FSR 4.1.2 can expose more than one upscaler choice. A library name alone cannot settle which algorithm GTA VI actually uses.
Microsoft’s October GDK notes describe two machine-learning models: Full INT8 and Lite INT8. The Lite model is less than half the size and has a lower upscaling cost, giving developers another way to balance image quality against GPU workload on Series X and Series S. Microsoft describes support for both consoles, rather than restricting the technology to Series X.
The practical distinction is simple: developer availability is not automatic game adoption. Microsoft documents an integration developers can implement; it does not identify GTA VI as a shipping implementation.
PSSR on PS5 Pro has stronger confirmation
The PlayStation side has firmer footing. VideoCardz reports Rockstar’s confirmation of PSSR support and exclusive ray-traced shadows on PS5 Pro, alongside a 30-FPS target for current-generation consoles. However, Rockstar’s statement does not identify the precise PSSR version or publish rendering resolutions.
Separately, preload analysis reportedly found a mfsrVersion 13.60 value. That supports discussion of a potentially different PSSR implementation, but the meaning of that identifier remains unconfirmed by Rockstar. Nor should PS5 Pro’s confirmed support be treated as confirmation of the base PS5’s exact reconstruction technology.
What players should take away
Upscaling reconstructs a higher-resolution image from lower-resolution rendering. Microsoft’s sample illustrates that distinction with a 2560 × 1440 render reconstructed to a 3840 × 2160 output—sample settings, not GTA VI specifications.
For now, the evidence supports an Xbox FidelityFX integration clue and confirmed PSSR support on PS5 Pro. It does not establish an Xbox FSR version, a promised upgrade, or an image-quality winner between consoles. The acronyms are lining up nicely; the actual comparison still needs confirmed implementations and measured results.