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Meta: Muse Spark Open.

multimodal closed 1M ctx
Cheapest input
$1.25/M
on OpenRouter
Cheapest output
$4.25/M
on OpenRouter
Hosted equiv.
~$1.53/hr
@ 100 tok/s on OpenRouter

Muse Spark Open is a coding-optimized open-weight model. Trained specifically for agentic coding workflows, it delivers higher first-attempt accuracy, reliable tool calling, and deep codebase understanding across the rep

Hosted API only

No self-host path — closed weights.

Meta: Muse Spark Open's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $1.25 $4.25 Launch ↗
Sources

Official references.

Hugging Face ↗
FAQ

Frequently asked.

How do I run Meta: Muse Spark Open?
Meta: Muse Spark Open is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access Meta: Muse Spark Open?
Meta: Muse Spark Open is available via Fireworks AI, OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run Meta: Muse Spark Open?
API pricing starts at $1.25/M input tokens and $4.25/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is Meta: Muse Spark Open open-source or proprietary?
Meta: Muse Spark Open is a proprietary model from Meta AI. Access is API-only — there are no public weights to download.