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Models › meta › Meta: Muse Spark Open

Meta: Muse Spark Open — pricing & benchmarks

By meta · Updated 2026-11-01 · Open weights · custom licenseReads imageslong-context / RAGreads images / documentsaudiostep-by-step reasoningopen weights / self-hostable

Meta: Muse Spark Open costs $1.25 per 1M input tokens and $4.25 per 1M output tokens, with a 1M context window. It is best suited for long-context / RAG, reads images / documents, audio, step-by-step reasoning, open weights / self-hostable, and is available through one OpenAI-compatible Appmo API key.
$1.25Input / 1M
$4.25Output / 1M
1MContext
9.7KHF downloads (30d)
734HF likes
76Buzz (0-100)

What Meta: Muse Spark Open is used for

Meta: Muse Spark Open is best suited for long-context / RAG, reads images / documents, audio, step-by-step reasoning, open weights / self-hostable. Access it through one Appmo API key alongside 444 other models — Appmo's optimizer can route to it automatically when it is the best value for a request. Weights: huggingface.co/meta-models/Muse-Spark-Open-816B-A42B.

What people are saying (last 30 days)

Not enough posts yet to judge community sentiment. 8 Hacker News stories (1.4K points) · 49 new GitHub repos mentioning it. How we measure this.

Use it via the Appmo API (OpenAI-compatible)

curl https://appmo.com/v1/chat/completions \
  -H "Authorization: Bearer $APPMO_KEY" \
  -d '{"model":"meta/muse-spark-open","messages":[{"role":"user","content":"Hello"}]}'

FAQ

How much does Meta: Muse Spark Open cost?
Meta: Muse Spark Open costs $1.25 per 1M input tokens and $4.25 per 1M output tokens ($2 blended), as of 2026-11-01. Prices are expected to fall as competition increases.

What is Meta: Muse Spark Open best for?
Meta: Muse Spark Open is best suited for long-context / RAG, reads images / documents, audio, step-by-step reasoning, open weights / self-hostable.

How do I use Meta: Muse Spark Open?
Send requests to Appmo's OpenAI-compatible endpoint with model id "meta/muse-spark-open" and one API key — no separate provider account needed.

Is Meta: Muse Spark Open open source?
Yes — its weights are public on Hugging Face (meta-models/Muse-Spark-Open-816B-A42B) under a custom license; check the license terms before commercial use.

Can Meta: Muse Spark Open create images?
No. Meta: Muse Spark Open can read and understand images, but it only writes text.