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.
Coding is a pretty small slice of the markets in play. Google's models are driving cars right now. Using coding agents doesn't give much insight into performance in the broader world; I would assume assume Google is performing better in general even if Claude or Codex is currently outperforming for coding.
Google also owns 15% of anthropic.
It's more that they know they can eventually clone any successes the other companies have and steal their market share. Their really is no moat. In a more normal environment they would be buyout candidates but that's a bit too far gone at this point, so you just let them run until they are out of gas and Google can benefit from any advances without upfronting the cost.
Even with anthropics record breaking revenue growth I don't see how the pure AI companies can sustain, but the catch-22 is that any obvious pivot proves that. This puts the more traditional tech companies in position to ride the back of the wave until the growth curve tops.