I’m not sure I agree that g explains all model capabilities. I think “claudespeak” is a consequence of the shift from training on RLHF to training on verifiable rewards. Thus the models seem to become worse at storytelling, fiction, readability, not better.
Even if we do accept that models have some “g” and that it correlates with all domains, there’s no reason to think that the current trajectory of LLM intelligence will grow more quickly or even as quickly. In every other technology we have an early period of slow growth during experimentation, and then a rapid period of growth, and then stagnation.
For all we know, 2026 could be the year of stagnation. It’s possible that we will reach finishing returns. If thats true, then it won’t matter how much that task correlates with overall g, because g won’t be increasing that much.