I think Google is a bit sandbagging here knowing they have all the data and likely better models hiding. My theory is it's a bit of not disrupting the stock market direction by exposing whose really the boss. If they can do it cheaper, faster, and better, people start asking questions, especially with upcoming IPO's.
It's important to remember that the cloud division, rapidly becoming Google's golden goose, does not give one fuck about Gemini and would happily sell out all of Gemini's compute to Anthropic and OAI if given the opportunity.
This makes no sense. Google is beholden to its own shareholders, not the markets at large.
In any case, it's well known that devs in Google have liked anthropic/openai models for coding more than gemini, so unless they're hiding their best models from the people within, I think it's just the case that they're behind.