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Specs

Model IDmeta/muse-spark-1.3
Context window1M tokens
Max output944K tokens
Input price$1.25 / 1M tokens
Output price$4.25 / 1M tokens
Inputs → outputsText, Image, Video, File → Text
Open weightsNo

How to use Muse Spark 1.3 in your app

The quickest way is through an API gateway such as OpenRouter, which uses the same format as the OpenAI API. Create a key, then send a request with the model ID meta/muse-spark-1.3:

curl https://openrouter.ai/api/v1/chat/completions \ -H "Authorization: Bearer $OPENROUTER_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "meta/muse-spark-1.3", "messages": [{"role": "user", "content": "Explain this in simple words..."}] }'

Prefer no code? Many tools in our AI tools directory run on models like this one.

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Questions about Muse Spark 1.3

What is Muse Spark 1.3?

Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows. It is designed to keep track of information across extended tasks, work through...

How big is the context window of Muse Spark 1.3?

Muse Spark 1.3 can read up to 1,048,576 tokens in one request, roughly 786,432 words.

How much does Muse Spark 1.3 cost?

Through OpenRouter, Muse Spark 1.3 costs about $1.25 / 1M tokens for input and $4.25 / 1M tokens for output. Prices change, so check before large jobs.

Is Muse Spark 1.3 open source?

Muse Spark 1.3 does not have downloadable weights. You use it through Meta or an API provider.

What can Muse Spark 1.3 take as input?

Muse Spark 1.3 accepts text, image, video, file and produces text.

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Specs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 2 Sep 2026.

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