I don't know what my probabilities are on literal extinction, but I think there are a number of ways AI could go poorly for humanity, and at the current frankly terrifying pace humanity will be quite lucky if we manage to find and stay on the narrow path between all the bad outcomes.
I am heartened by the many costly actions OpenAI has taken recently (detailed in several recent posts), but regardless of what you think of OpenAI, this is not a problem that can be solved by any one company (or country) in isolation. We need coordination to be able to approach future capability increases with an appropriate degree of caution and humility, and we need it yesterday.