Not to mention - it is American. This is the first competitive non-Chinese open weights model since what, Llama 3?

It's not the better model since Llama3. Trinity Large is American and quite decent, unfortunately tons of crazy good models have been out and it's harder to run locally at 400B. I think Arcee did a terrible job of promoting their model.

https://www.arcee.ai/blog/trinity-large

Gemma 4

The largest Gemma 4 model has 31B parameters. It’s not in the same class.

Isn't that British?

British-American with much of the research happening in London. I don't know if it's known what team specifically worked on which of the Gemmas, I'd suspect it's a healthy mix of multiple satellites across the globe, but the contribution by the UK Deepmind parts likely was significant, certainly not so small that it'd justify downing a regular question.

nemotron