Keep in mind while this is the date they officially became part of SpaceX, they have already been collaborating on building models together. So don't expect a significant bump in performance on new Grok models due to the additional data from Cursor--that bump already happened with Grok 4.5[1] and now 4.6.

[1] https://cursor.com/blog/grok-4-5

There still may be Opus->Fable type bump when they finish training larger models. Remember, Grok 4.6 is still Opus-sized and they have larger models in training.