The mentioned South Bay locations are xAI's Palo Alto office, and an office in Santana Row. Both locations likely have connections to Caltrain.
I don't know where xAI's Palo Alto office is, but transit in the corporate Palo Alto office are generally good. If xAI is in the Stanford Research Park, you'll be taking a shuttle that runs only during commute times, and takes 15-30 minutes, depending on where exactly you get off.
Santana Row is more confusing. You'll travel either to Santa Clara or San Jose and take a bus. From Santa Clara, the bus is ~15 minutes. From San Jose, the bus is faster, but you've got a half- or one-mile walk.
The Santana Row office is miserable to get to via Caltrain. You're going to want to bike or scooter and even then it's a trip on Stevens Creek/San Carlos, which is exceptionally busy at all times of day due to the two malls next to it and also it drops bike lanes for some portion of the road.
I feel like this was the case already? Maybe not for 2 hours but I do distinctly remember that when I popped into the Twitter offices for a bit I was able to park there for a few hours but after that it would charge me
I don't know where xAI's Palo Alto office is, but transit in the corporate Palo Alto office are generally good. If xAI is in the Stanford Research Park, you'll be taking a shuttle that runs only during commute times, and takes 15-30 minutes, depending on where exactly you get off.
Santana Row is more confusing. You'll travel either to Santa Clara or San Jose and take a bus. From Santa Clara, the bus is ~15 minutes. From San Jose, the bus is faster, but you've got a half- or one-mile walk.