Last refreshed 2026-10-15. Next refresh: weekly.
Why use Muse Spark Open on OpenRouter?
OpenRouter offers Muse Spark Open with competitive pricing. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare Muse Spark Open across 4 providers to find the best fit for your use caseInput / 1M
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Output / 1M
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Cache
Not sourced
Batch
Not sourced
Setup recipe
Docs fallbackInstall
Use the provider REST API or SDKAuth
Create a provider API keyCall
model: meta/muse-spark-openModel ID
meta/muse-spark-openRequest example
Curated snippets for this provider are not sourced yet. Use OpenRouter documentation with model ID
meta/muse-spark-open.Gotchas
- Use provider model ID "meta/muse-spark-open", not the LLMReference slug "muse-spark-open".
Compare Muse Spark Open Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Together AI | $1.25 | $4.25 |
| Fireworks AI | $1.25 | $4.25 |
| GroqCloud | — | — |
| 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.
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Model Specs
Released2026-10-15
Parameters816B (42B activated)
Context1M
ArchitectureMixture of Experts