its three big companies at the frontier now? openai, anthropic and now meta.

why is google still not frontier?

They're not until they are. No doubt they are working on something and have better resourcing than the AI labs

Gemini 4 Argon release a few days ago was frontier a few days ago. Things move fast.

I think some of the benchmarks that Meta didn't pick show Gemini 4 Argon ahead but really the benchmarks are not that great any more and getting increasingly disconnected from reality as people search for "headroom" in the evals to avoid saturation I think. Opus 5.5 is "top" for example but I really dislike the way it talks to me (it feels quite condescending, holier-than-thou, uptight etc) and prefer Gemini 3.8 flash as a daily driver just because it's so much more pleasant (and faster!) to work with and it's code is good-enough for my needs, despite being weaker in the benchmarks.

Grok has been at the frontier since 4.6