Question: After updating GTAV to 1.28 on PC, I’m noticing considerably lower framerate. Is this issue being looked into?
Answer: We have received reports of lower framerate in GTAV and GTA Online after Title Update 1.28 on PC, and we are looking into these reports now. If you would like to receive an automatic email notification as soon as there is more information, please log into the Support Site and click Subscribe at the top of this page.
7/20/15 Update: This issue has now been resolved with a Title Update. Please make sure you are connected to the Internet at boot to download and install the update.
We also received some reports linking decreased performance when using Story Mode mods to TU 1.28. As mentioned previously, we are not actively targeting players using mods in Story Mode, nor are we explicitly implementing protections against them in-game. Our primary focus is on protecting GTA Online against modifications that could give players an unfair advantage, disrupt gameplay, or cause griefing. However, as a reminder, mods are still unauthorized and as such, Title Updates may cause Story Mode mods to behave in unexpected ways because they are not supported or tested, and players run them at their own risk.
7/22/15 Update: We have received a small number of reports from players who are still experiencing occasional framerate issues or stuttering following 1.28.01, and are continuing to investigate. Please stay tuned to this page for more information as soon as it is available.
9/15/15 Update: This issue has now been resolved as of Title Update 1.29.

9/15/15 Update: This issue has now been resolved.