Using Muse Spark Open on OpenRouter

Implementation guide · Muse · AI at Meta

ServerlessOpen Weights

OpenRouter exposes Muse Spark Open through model ID meta/muse-spark-open. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-10-15. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at OpenRouter and generate an API key.
  2. 2
    Use the OpenRouter SDK or REST API to call meta/muse-spark-open — see the documentation for request format.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

Capabilities

VisionMultimodalReasoningJSON / Tool useAudio

About Muse Spark Open

Muse Spark Open is the open-weight release of Meta Superintelligence Labs' Muse Spark, an 816-billion-parameter mixture-of-experts model that activates about 42 billion parameters per token. Released October 15, 2026 under the Muse Model License, it is built for coding and agentic work, takes text, image, video and audio input, returns text, and has a 1M-token context window. Weights are on Hugging Face in BF16 and NVFP4.

Full model details →

Model Specs

Released2026-10-15
Parameters816B (42B activated)
Context1M
ArchitectureMixture of Experts

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Also available on(3)

Together AI$1.25/1MFireworks AI$1.25/1MGroqCloud
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Provider

OpenRouter

OpenRouter, Inc.

New York, NY, USA