[HarHarVeryFunny]

I suppose the closest alternative to planning ahead (considering alternatives before taking any action - in this case generating tokens) is getting it right the first time, which is only really possible in cases of highly constrained circumstances (prompts) where the model saw enough similar examples to predict the same correct/preferred response. So, to that extent, I suppose better prediction - bigger model, more/better training, etc, reduces the need for planning a bit. Architectural changes, such as adding working memory, that boost predictive power, would also help.

But, yeah, hard to see too many alternatives.

1) Get it right first time (not always possible)

2) Don't plan, but at least consider a bunch of poor alternatives - tree of thoughts

3) Actually implement planning