Muse Spark

class A research

Meta Superintelligence Labs' new closed model; top-10 on both independent boards but private-preview only, most axes undisclosed.

Layer 1 — factual axes

API & price	no public API or pricing (private preview)	unverified	—
Context	not disclosed	unverified	—
Weights	closed	secondary	source ↗ 2026-07-04
Multimodal	not disclosed	unverified	—
Free tier	no	secondary	source ↗ 2026-07-04

1487 / 1600

LMArena text (#6) ↗ measured 2026-07-04

Meta Superintelligence Labs’ new closed model; top-10 on both independent boards but private-preview only, most axes undisclosed.