Why not wait one more day for GPT-5.6?
Also throw in GLM 5.2 for good measure
That will be in the Part 2 article.
I worry that GPT 5.6 will be heavily restricted and have the same feature to fallback to another model like Claude fable 5 does all too often. That fallback shenanigans mess up actual benchmarks and I don't like it.
And why not Sonnet?
If we wait for the next models, we will never test anything because there will always be another model. Like the Ai Scotsman:
> "Nay, laddie, that’s no’ the real AI Scotsman! He’s grander still! More powerful! Just wait for the next model!"