[goldwelder42]

Since the GPT-4 paper didn't reveal any details of their model, it's possible that GPT-4 is already using some variant of toolformer (https://arxiv.org/abs/2302.04761).

[optimalsolver]

If it was, its mathematical abilities would be much better than they are.

[MacsHeadroom]

GPT-4's mathematical abilities are exceptionally good compared to GPT-3.5.