Meta Muse Spark 1.3 - Box Dev Docs

According to Meta, Meta Muse Spark 1.3 is a multimodal model designed for general-purpose text and image understanding.

Model details

Item	Value	Description
Model name	Muse Spark 1.3	The name of the model.
Model category	Standard	The category of the model: Standard, Premium, or Ultra.
API model name	`meta__muse_spark_1_3`	The name of the model that is used in the . You must provide this exact name for the API to work.
Compliance	N/A	Government compliance frameworks and authorizations applicable to this model.
Hosting layer	Meta	The trusted organization that securely hosts the LLM.
Model provider	Meta	The organization that provides this model.
Release date	September 2nd, 2026	The release date for the model.
Knowledge cutoff date	Not specified	The date after which the model does not receive information updates.
Input context window	1,048,576 tokens	The number of tokens supported by the input context window.
Maximum output tokens	Not specified	The number of tokens that can be generated by the model in a single request.
Empirical throughput	Not specified	The number of tokens the model can generate per second.
Open source	No	Specifies whether the model’s code is available for public use.