Decoding Gemma 4's Mixture of Experts: Budget Impact Unveiled

This is a submission for the Gemma 4 Challenge: Write About Gemma 4 Gemma 4's most interesting model isn't the 31B flagship. It's the 26B A4B — a Mixture-of-Experts model that activates only 4 billion parameters per token while delivering performance nearly identical to the dense 31B. If that sounds