The Verge journalist Tom Warren previously reported that Microsoft had allegedly agreed to exclusive GTA VI streaming: at launch, Xbox Cloud Gaming was supposed to be the only service allowing Rockstar's game to be played in the cloud. According to Warren's sources, this was about a statement by Xbox head Asha Sharma, who promised employees something that “no other platform owner does.”
However, Matthew Ball called these reports erroneous:
Glad to see such interest in GTA VI and Xbox, but it also led to erroneous reports. We look forward to GTA VI launching on Xbox on November 19, although the game will not be available for exclusive streaming and will not be streamed on PC.
On November 19, GTA 6 will be released on PS5 and Xbox Series X|S, and the PC version has not yet been officially announced. Journalist Jez Corden suggests that the game may not be available via streaming services at launch at all.