Research Training And DistillationResearch Item

Gemma 4 memory saving attention redesign for long context

April 4, 2026Rohan Paul

Rohan Paul highlights an architectural explanation that Gemma 4 uses mostly cheap local sliding window attention with occasional full attention to save memory while supporting long context.

The big idea here is a very aggressive memory-saving redesign of attention: Gemma 4 does most of its work with cheap local sliding-window attention, then inserts occasional full
Rohan Paul
context windowcompression algorithmgemmacontext windowcompression algorithm

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