People I work with either use the dogfood versions of our models, the latest public versions thereof, or Opus 5.5. It's a personal preference thing, we have public usage dashboards and you can see some people are 100% Gemini, some are 100% Claude, some are using both.

Other comments on this already, so this is more of a confirmation.

I'm not going to comment on others use of Carbon except to say some article that came out before Argon's external launch saying Googlers hate it was nonsense. Not to say everyone loved it all the time.

I use Carbon heavily and am quite happy with it. For complex designs I may have it and Opus iterate back and forth on the design. They have their own strengths and Opus 5.5 is great, but I use Gemini far more than I do Opus at this point. I know a lot of the jagged edges of Gemini better than Opus though, so take that as you will.

I personally use 3.8 Flash most of the time and Argon/Carbon when I need to do deep analysis or research an ambiguous problem. Opus/Fable is used when I need a second/third opinion.

3.8 Flash + /boost is very capable.

I have ended up using Argon more and more. If you keep it grounded it is a great model. Extremely thorough. A little slow. It feels like it gets things done better than Opus 5.5. It slowly churns through everything. Not necessarily quality but its adherence to goals seems better and it takes less prompting.

For cyber use cases I am absolutely blown away. Can’t say much more, but it is a serious model.

Just my opinions. I really recommend people take it seriously. For many jobs I just prefer it now. It is a new model so it needs time. Opus 5.5 is a sweet spot as well. I use both extensively.

I don't think a big ai lab like Deep Mind would accept leaking their IP to their competitors so that their engineers can use code completion and generation.

From what I heard from a Googler, Claude models are still the most popular for coding internally but it’s a couple of month old info so take it with a grain of salt.

Personally, any of the flash options is my default most times because it tends to perform tasks faster and with the same level of success.