Meta · Meta

Muse Spark Open.

Muse Spark Open is a Meta model, released on 15 October 2026. It takes text, images, video, files and audio and returns text, with a 1.05 million-token context window. Artificial Analysis scores it 24.7 on its Intelligence Index, number 3 of 3 rated Meta models.

Open weights
1.05M context

Evaluate Muse Spark Open on your work

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Specification

Provider: Meta
Family: Meta
Released: 15 October 2026
Catalogue id: meta/muse-spark-open
Context window: 1.05 million tokens
Maximum output: 131,072 tokens
Inputs and output: Text, images, video, files and audio in; text out
Capabilities: Tool calling, structured outputs and adjustable reasoning
Weights: Published: meta-models/Muse-Spark-Open-816B-A42B
Listed price: $1.25 input, $4.25 output, $0.150 cached input per million tokens

Provider-published specifications as of 30 October 2026, not figures we measured. Model families move quickly — check the provider's own documentation before committing to a number.

Source: Muse Spark Open in the OpenRouter catalogue, checked weekly. Confirm current terms in Meta's own documentation before you commit.

INDEPENDENT RATINGS

How Muse Spark Open scores.

Measured by Artificial Analysis on its own evaluation suite, at every reasoning setting it tested.

Against other Meta models

Artificial Analysis Intelligence Index · Higher is better · Linear scale from 0 to 48.0

Muse Wonder: 43.3
Muse Spark 1.3: 36.4
Muse Spark Open: 24.7

Each model at its best reasoning setting. The index combines reasoning, knowledge, maths and coding evaluations; it does not show cost, latency or data residency.

Source: Artificial Analysis. Checked 30 October 2026. Measured independently by Artificial Analysis, not by QQuantum.ai or the provider.

Against the best of other families

Artificial Analysis Intelligence Index · Higher is better · Linear scale from 0 to 66.0

Gemini 4 Carbon: 59.4
Claude Opus 5.5: 58.4
GPT-6 Astra: 56.9
Kimi K3.1 Pro: 46.0
Muse Spark Open: 24.7

The highest-rated model of each other family we cover, at its best reasoning setting.

Source: Artificial Analysis. Checked 30 October 2026. Measured independently by Artificial Analysis, not by QQuantum.ai or the providers.

BENCHMARKS

Benchmark by benchmark.

Muse Spark Open on individual evaluations

Score (%) at its best reasoning setting · Higher is better · Linear scale from 0 to 100.0

GPQA Diamond (science): 89.0
Humanity's Last Exam: 43.9
SciCode: 58.4
Terminal-Bench 4.0 (agentic coding): 8.1
Terminal-Bench 2.1: 76.4
AA-LCR (long-context reasoning): 78.3

Each evaluation run by Artificial Analysis under its published methodology. Scores on public benchmarks can overstate performance on your own data.

Source: Artificial Analysis. Checked 30 October 2026. Measured independently by Artificial Analysis, not by QQuantum.ai or the provider.

What it costs

Price the whole answer.

Illustrative calculation at listed rates: a batch of 10 million input tokens and 1 million output tokens costs $16.75 on Muse Spark Open. A thousand requests of 2,000 input and 500 output tokens each costs $4.63. Calculation: input millions × input rate + output millions × output rate; it excludes reasoning tokens, retries, tools, tax and review time.

Compare cost per accepted result, not per token: replay the same work on two or three candidates and count the answers you would actually ship. Our model-routing approach sends each request to the cheapest model that passes.

THE REST OF THE FAMILY

Other Meta models.

Every Meta model in the catalogue. Our Meta page covers where the family fits and how we evaluate it.


Muse Spark Open open	15 Oct 2026	24.7	140	1.05M	$1.25	$4.25
Muse Wonder	12 Oct 2026	43.3	150	1.05M	$4.00	$20.00
Muse Spark 1.3	2 Sep 2026	36.4	—	1.05M	$1.25	$4.25
Muse Glimmer 30B open	9 Aug 2026	—	—	131k	$0.300	$1.20
Muse Spark 1.2	5 Aug 2026	—	—	1.05M	$1.25	$4.25
Muse Spark 1.1	9 Jul 2026	—	—	1.05M	$1.25	$4.25
Llama 4 Maverick open	5 Apr 2025	—	49	524k	$0.188	$0.653
Llama 4 Scout open	5 Apr 2025	—	135	1.31M	$0.100	$0.300
Llama 3.3 70B Instruct open	6 Dec 2024	—	—	131k	$0.100	$0.320
Llama 3.2 1B Instruct open	25 Sep 2024	—	—	60k	$0.027	$0.201
Llama 3.2 3B Instruct open	25 Sep 2024	—	—	131k	$0.050	$0.330
Llama 3.1 70B Instruct open	23 Jul 2024	—	—	131k	$0.400	$0.400
Llama 3.1 8B Instruct open	23 Jul 2024	—	—	131k	$0.050	$0.080

Intelligence and coding: Artificial Analysis indices at the model's best reasoning setting, and its measured output speed. Context and prices: the OpenRouter catalogue list price in USD per million tokens. Released: the provider's date where Artificial Analysis records one, otherwise the date the catalogue first listed it. Refreshed weekly; not measured by QQuantum.ai. Select a heading to sort.

All 13 Meta models · Compare every family

Questions

Questions about Muse Spark Open.

When was Muse Spark Open released?

Muse Spark Open was released on 15 October 2026, according to Artificial Analysis.

What is the context window of Muse Spark Open?

1.05 million tokens, with up to 131,072 output tokens per response, as listed in the OpenRouter catalogue on 30 October 2026. A long window is not the same as reliable recall across it; evaluate retrieval on your own documents.

How much does Muse Spark Open cost?

The catalogue lists $1.25 per million input tokens and $4.25 per million output tokens, and $0.150 per million cached input tokens (checked 30 October 2026). Meta's own rates, batch discounts and cloud marketplaces can differ.

How does Muse Spark Open rate against other Meta models?

Artificial Analysis gives it 24.7 on its Intelligence Index at its best reasoning setting, number 3 of the 3 Meta models it rates. A composite score is a shortlist tool; your own task decides.

Can Muse Spark Open run on our own hardware?

Its weights are published (on Hugging Face as meta-models/Muse-Spark-Open-816B-A42B), so it can be self-hosted subject to its licence. Check the licence and size the serving stack before buying hardware.