/AI22d ago

Federico Cassano, research lead at Cursor AI, reports a model trained with the Muon optimizer as the start of Composer 2.5 research

AI Judge changed title after evaluation, original title: "Federico Cassano, research lead at Cursor AI, announces training model with Muon optimizer for Composer 2.5"

Muon training run is the central result from the Composer 2.5 effort.

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Federico Cassano
bilal
elie#706
Original postbilal#1366
Federico Cassano@ellev3n11

we finally trained a model with muon. we now have a real research effort.

3:45 PM · May 18, 2026 · 37K Views
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elie@eliebakouch

biggest lesson from composer 2.5

Federico Cassano@ellev3n11

we finally trained a model with muon. we now have a real research effort.

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