Gemma 4 Scored 89.2% on AIME. Here's Why That Number Should Change How You Think About Open-Source AI

This is a submission for the Gemma 4 Challenge: Write About Gemma 4

AIME — the American Invitational Mathematics Examination — is the test given to the top 5% of high school math competitors in the US. The problems require multi-step proof construction, elegant reasoning, and a comfort with number theory, combinatorics, and geometry that most adults don't have.

Gemma 3 scored 20.8% on AIME 2026.

Gemma 4 scored 89.2%.

That's not an incremental improvement. That's a qualitative category change — and it happened in one model generation, in an open-weight model that runs on a consumer GPU.