The problem with OpenAI / Grok / DeepSeek / Gemini / ... is that I don't think any of them really have a moat, and if what they're investing in becomes commoditized then none of them are getting any of their up-front investment back.
If one of them is able to pull ahead far enough that the others all fail, then that one will get their money back by monopolizing the space, but then that's kind of Robot Takeover territory, which pits the owners of the AI against all of humanity. The owners would love to have a world controlling beast-machine of course, but it's very unclear whether the machine would take the opportunity to strike off on it's own.
In any case, I don't think these scenarios are nearly as likely as it being a greasy pole that no company manages to climb...