I mean, it's certainly possible that the government/wall street/etc have a bigger, better, and more powerful AI model but I wouldn't exactly call it likely.

AI as a technology is still in it's infancy in many ways, I highly doubt the government has some crazy new Sci Fi engine capable of much more than "the free version from a website". Faster computation and better data processing? maybe. But the limits of what is technologically possible are still limits even if your employer is 3 letters.