Model tracker / Meta
Muse Spark Open
Muse Spark Open is an everyday open-weight model from Meta, released 15 October 2026. At Together AI it costs $1.25 per million input tokens and $4.25 per million output tokens, with a 1M-token context window.
- Made by
- Meta Platforms
- Released
- 2026-10-15
- Status
- Generally available, new
- Tier
- Everyday
- Weights
- Open
- Context window
- 1,048,576 tokens
- Input
- text, image, audio, video
- API id
meta-models/Muse-Spark-Open-816B-A42B
Muse Spark Open price at Together AI
US dollars per million tokens. Blended is 3 input tokens for every output token, one number to compare on.
| Provider | Input | Output | Cached input | Blended | Batch | Checked |
|---|---|---|---|---|---|---|
| Together AI | $1.25 | $4.25 | $0.15 | $2.00 | – | 2026-10-15 |
- Together AI: Open weights (816B total, 42B active), gated download, under Meta's Muse Model License: model-as-a-service providers above $20M revenue need a separate agreement with Meta. Same list price on Fireworks, Baseten and Nebius via OpenRouter at launch.
Muse Spark Open benchmarks
| Benchmark | Score | What it measures | Reported by |
|---|---|---|---|
| GPQA Diamond | 89% | graduate-level science questions answered correctly | Meta |
Scores reported by a model's maker aren't independently checked.
Models like Muse Spark Open
Other everyday models closest in price, at each maker's own price or the cheapest provider.
| Model | Input | Output | Context | Weights |
|---|---|---|---|---|
| Muse Spark Open | $1.25 | $4.25 | 1M | Open |
| Muse Spark 1.3 Meta | $1.25 | $4.25 | 1M | Closed |
| DeepSeek V4 Pro DeepSeek | $1.32 | $3.96 | 1M | Open |
| GLM-5.3 Z.ai | $1.40 | $4.40 | 1M | Open |
| Step 5 Preview StepFun | $1.00 | $2.70 | 1M | Closed |
| Qwen3.8 Max Alibaba | $2.00 | $6.00 | 1M | Open |
Compare them all in the model tracker →
Muse Spark Open on dbggr
- Meta releases Muse Spark Open, an 816B open-weight model optimised for two Mac Studios Daily, 2026-10-15
Muse Spark Open FAQ
How much does Muse Spark Open cost?
Muse Spark Open costs $1.25 per million input tokens and $4.25 per million output tokens at Together AI, and $0.15 per million cached input tokens. Prices are list prices in US dollars, last checked 15 October 2026.
What is Muse Spark Open's context window?
Muse Spark Open takes up to 1,048,576 tokens in one request.
Is Muse Spark Open open weight?
Yes. Meta publishes the weights, so you can run Muse Spark Open yourself or at any host that serves it.
Where can I use Muse Spark Open?
Muse Spark Open is available from Together AI. At Together AI, call it as meta-models/Muse-Spark-Open-816B-A42B.