Right now, due to profound shortfalls in both data and hardware compared to the US labs, the OSS models are IMO basically technology demonstrators that in practise are even more jagged than the US labs' efforts. The high points of the jaggedness are close - but number of happy paths is many times fewer, and their behaviour inside the harness is far less refined. Barring some incredible breakthrough I don't think that is changing without a much higher level of resources - which seems impossible given the current hardware environment.
I have no reason to think that Anthropic or OpenAI are in possession of some secret sauce that the Chinese labs can't duplicate given the right resources, but the fact remains that absent those resources they'll remain behind. Barring some incredible bombshell reveal from Huawei I don't think this asymmetry resolves in a year. In three years it may well be a different story.
But the question was about whether the Chinese labs will have fable-equivalence in 1 year. I am by no means some kind of insider, but knowing the vaguest outlines of what went into Mythos, they just can't do it. The compute is not there. The Chinese engineers are incredible, but they're not literal magicians.
Of course there could be something incredible to come out of left field and overturn the apple cart yet again, but that's speculation. It would be awesome, sure! But I wouldn't bet too heavily on it.
And FWIW - again, no disrespect at all to the Chinese engineers but I don't rate GLM5.2 as being even close to opus 4.6. It can hit a few benchmarks, sure, that's the top edge of the "jag". But filling in the rest of the capabilities - again, it takes compute and data the OSS labs just don't have, that anyone knows about at least.