Muse Spark 1.3 with max reasoning launches on Muse Code and Meta Model API

Meta for Developers @MetaforDevsOriginally posted 2026.09.05

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Muse Spark 1.3 with max reasoning is now available on Muse Code and Meta Model API. Developers can build with frontier performance without the frontier prices. We thought showing would be better than telling, and encouraged our friends in Meta Superintelligence Labs to come up with a few demos. One-shot prompt: Build a rendering engine from scratch in C that writes pixels directly, scales from simple primitives to complex scenes, and culminates in a striking lighting demo. Check out the rest 👇🏻(1/4)