Meta, open weights

# Muse Spark Open

> Muse Spark Open by Meta, released October 2026. Ranked #26 of 357 with a Noometry Index of 55.2. API: $1.25 in / $4.25 out per M tokens. 1.05M context. Scores, sources and comparisons.
- Canonical page: https://noometry.com/models/muse-spark-open
- Last updated: 2026-10-16
- Title: Muse Spark Open Benchmarks, Price & Rank (October 2026)

Muse Spark Open by Meta ranks 26th of 357 ranked models on the Noometry Index as of October 2026, with a score of 55.2. Its strongest category is math, where it ranks 25th. API pricing starts at $1.25 per million input tokens and $4.25 per million output tokens, with a 1.05M-token context window.

Last verified October 16, 2026

## Specifications

- **Noometry rank:** #26 of 357
- **Index score:** 55.2
- **Evidence:** Reported 5 results
- **Provider:** [![](/logos/meta.svg) Meta](https://noometry.com/providers/meta)
- **Released:** October 15, 2026
- **Weights:** Open weights
- **Reasoning:** Yes
- **Context window:** 1.05M
- **Max output:** 131K
- **Input price:** $1.25 / M
- **Output price:** $4.25 / M
- **Blended price:** $2 / M
- **Output speed:** Not measured
- **Value:** #139 of 222
- **Knowledge cutoff:** January 2026
- **Input:** text, image
- **Hugging Face:** [meta-models/Muse-Spark-Open-816B-A42B](https://huggingface.co/meta-models/Muse-Spark-Open-816B-A42B)

## Category scores

Each category score combines every public result we have in that category.

Muse Spark Open category scores

1.  Math 68.6
2.  Knowledge 60.1
3.  55606570

Muse Spark Open category ranks
| Category | Score | Rank | Results |
| --- | --- | --- | --- |
| [Math](https://noometry.com/best/math) | 68.6 | #25 | 3 |
| [Knowledge](https://noometry.com/best/knowledge) | 60.1 | #32 | 2 |

## Strengths and weaknesses

Categories where Muse Spark Open places highest and lowest among the models ranked in each, with its score against that category's median.

### Strongest categories

Muse Spark Open: strongest categories
| Category | Score | vs median | Rank |
| --- | --- | --- | --- |
| [Math](https://noometry.com/best/math) | 68.6 | +31.2 | #25 of 329, top 8% |

### Weakest categories

Muse Spark Open: weakest categories
| Category | Score | vs median | Rank |
| --- | --- | --- | --- |
| [Knowledge](https://noometry.com/best/knowledge) | 60.1 | +22.2 | #32 of 317, top 11% |

## Closest competitors

The models ranked just above and below Muse Spark Open. When scores are this close, price and speed are often the better way to choose.

Models ranked closest to Muse Spark Open
| Model | Rank | Score | Blended $/M | Speed |  |
| --- | --- | --- | --- | --- | --- |
| [Qwen3.8 Max](https://noometry.com/models/qwen3-8-max) | #22 | 56.9 | $3 | — | [Compare](https://noometry.com/compare/muse-spark-open-vs-qwen3-8-max) |
| [Grok 4.6](https://noometry.com/models/grok-4-6) | #23 | 56.8 | $3 | — | [Compare](https://noometry.com/compare/grok-4-6-vs-muse-spark-open) |
| [Gemini 3.1 Pro Preview](https://noometry.com/models/gemini-3-1-pro-preview) | #24 | 56.7 | $4.50 | — | [Compare](https://noometry.com/compare/gemini-3-1-pro-preview-vs-muse-spark-open) |
| [GLM-5.3](https://noometry.com/models/glm-5-3) | #25 | 55.3 | $2.15 | — | [Compare](https://noometry.com/compare/glm-5-3-vs-muse-spark-open) |
| [Grok 4.5](https://noometry.com/models/grok-4-5) | #27 | 55.0 | $3 | 4 | [Compare](https://noometry.com/compare/grok-4-5-vs-muse-spark-open) |
| [Muse Wonder](https://noometry.com/models/muse-wonder) | #28 | 55.0 | $8 | — | [Compare](https://noometry.com/compare/muse-spark-open-vs-muse-wonder) |
| [DeepSeek V4.1 Flash](https://noometry.com/models/deepseek-v4-1-flash) | #29 | 55.0 | $0.26 | — | [Compare](https://noometry.com/compare/deepseek-v4-1-flash-vs-muse-spark-open) |
| [Claude Sonnet 5](https://noometry.com/models/claude-sonnet-5) | #30 | 54.9 | $4 | — | [Compare](https://noometry.com/compare/claude-sonnet-5-vs-muse-spark-open) |

Sponsored placements are available on pages like this one. [Advertise on Noometry](https://noometry.com/advertise)

## Benchmark results

Every published result we track, with its source. Bold rows are the ones used for ranking; where several exist we prefer independent runs over self-reported numbers.

### Math

Muse Spark Open Math benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [FrontierMath (Tiers 1-3)](https://noometry.com/benchmarks/frontiermath) | 69.8% | #27 of 85, top 32% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-10-15 |
| [FrontierMath Tier 4](https://noometry.com/benchmarks/frontiermath-tier-4) | 31.7% | #30 of 67, top 45% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-10-15 |
| [OTIS Mock AIME 2024-2025](https://noometry.com/benchmarks/otis-mock-aime) | 98.1% | #27 of 177, top 16% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-10-15 |

### Knowledge

Muse Spark Open Knowledge benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [GPQA Diamond](https://noometry.com/benchmarks/gpqa-diamond) | 88.6% | #47 of 189, top 25% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-10-15 |
| [SimpleQA Verified](https://noometry.com/benchmarks/simpleqa-verified) | 56.6% | #19 of 80, top 24% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-10-15 |

## API pricing by provider

Muse Spark Open API prices
| Route | Input $/M | Output $/M | Cached input $/M | Checked |
| --- | --- | --- | --- | --- |
| [fireworks](https://fireworks.ai/docs/) | $1.25 | $4.25 | $0.15 | 2026-10-16 |
| [openrouter](https://openrouter.ai/meta/muse-spark-open) | $1.25 | $4.25 | $0.15 | 2026-10-16 |

[All Meta API prices →](https://noometry.com/llm-pricing/meta) [Estimate your cost →](https://noometry.com/tools/cost-calculator)

## Compare Muse Spark Open

-   [Muse Spark Open vs GLM-5.3](https://noometry.com/compare/glm-5-3-vs-muse-spark-open)
-   [Muse Spark Open vs Grok 4.5](https://noometry.com/compare/grok-4-5-vs-muse-spark-open)
-   [Muse Spark Open vs Gemini 3.1 Pro Preview](https://noometry.com/compare/gemini-3-1-pro-preview-vs-muse-spark-open)
-   [Muse Spark Open vs Muse Wonder](https://noometry.com/compare/muse-spark-open-vs-muse-wonder)
-   [Muse Spark Open vs Grok 4.6](https://noometry.com/compare/grok-4-6-vs-muse-spark-open)
-   [Muse Spark Open vs DeepSeek V4.1 Flash](https://noometry.com/compare/deepseek-v4-1-flash-vs-muse-spark-open)
-   [Muse Spark Open vs GPT-6 Astra](https://noometry.com/compare/gpt-6-astra-vs-muse-spark-open)
-   [Muse Spark Open vs Claude Opus 5.5](https://noometry.com/compare/claude-opus-5-5-vs-muse-spark-open)
-   [Muse Spark Open vs Gemini 4 Argon](https://noometry.com/compare/gemini-4-argon-vs-muse-spark-open)
-   [Muse Spark Open vs Kimi K3](https://noometry.com/compare/kimi-k3-vs-muse-spark-open)
-   [Muse Spark Open vs Qwen3.8 Max](https://noometry.com/compare/muse-spark-open-vs-qwen3-8-max)
-   [Muse Spark Open vs MiMo-V2.6-Pro](https://noometry.com/compare/mimo-v2-6-pro-vs-muse-spark-open)

## Other Meta models

-   [Muse Wonder](https://noometry.com/models/muse-wonder)55.0
-   [Muse Spark 1.3](https://noometry.com/models/muse-spark-1-3)54.8
-   [Muse Spark](https://noometry.com/models/muse-spark)50.8
-   [Muse Spark 1.2](https://noometry.com/models/muse-spark-1-2)50.6
-   [Muse Spark 1.1](https://noometry.com/models/muse-spark-1-1)50.4
-   [Muse Glimmer](https://noometry.com/models/muse-glimmer)42.0
-   [Codellama 70b Instruct](https://noometry.com/models/codellama-70b-instruct)34.0
-   [Codellama 34b Instruct](https://noometry.com/models/codellama-34b-instruct)31.0

## Frequently asked questions

### How good is Muse Spark Open?

Muse Spark Open by Meta ranks 26th of 357 ranked models on the Noometry Index as of October 2026, with a score of 55.2. Its strongest category is math, where it ranks 25th. API pricing starts at $1.25 per million input tokens and $4.25 per million output tokens, with a 1.05M-token context window.

### How much does Muse Spark Open cost?

Muse Spark Open costs $1.25 per million input tokens and $4.25 per million output tokens on fireworks, with cached input at $0.15.

### What is Muse Spark Open's context window?

Muse Spark Open accepts up to 1.05M tokens of input and can write up to 131K tokens in one response.

### Is Muse Spark Open open source?

Yes. Muse Spark Open's weights are downloadable from Hugging Face (meta-models/Muse-Spark-Open-816B-A42B); check the license for commercial terms.

### What are Muse Spark Open's strengths and weaknesses?

Relative to other ranked models, Muse Spark Open places best in math and lowest in knowledge.

### What is Muse Spark Open best at?

Its best category is math, where it ranks 25th on Noometry.

### Cite this page

Noometry. (2026). Muse Spark Open benchmarks and pricing. Retrieved October 16, 2026, from https://noometry.com/models/muse-spark-open

Quote Noometry with a link back to this page. It is also available in [Markdown](https://noometry.com/md/models/muse-spark-open.md).