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Specs

Model IDmeta/muse-spark-open
Context window1M tokens
Inputs → outputsText, Image, Video, File, Audio → Text
Open weightsYes

How to use Meta: Muse Spark Open 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-open:

curl https://openrouter.ai/api/v1/chat/completions \ -H "Authorization: Bearer $OPENROUTER_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "meta/muse-spark-open", "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 Meta: Muse Spark Open

What is Meta: Muse Spark Open?

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 repos developers...

How big is the context window of Meta: Muse Spark Open?

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

Is Meta: Muse Spark Open open source?

Meta: Muse Spark Open has open weights, so you can download and run it yourself, subject to its licence.

What can Meta: Muse Spark Open take as input?

Meta: Muse Spark Open accepts text, image, video, file, audio and produces text.

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Specs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 15 Oct 2026.

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