How accurate is Muse Spark Open?

Muse Spark Open answered 62 of 80 questions correctly (77.5%) in our 2026-10-27 run, ranking #9 of 78 models.

How fast is Muse Spark Open?

Muse Spark Open generated a median of 220 output tokens per second in our 2026-10-27 run, ranking #7 of 78. Median time to first token was 0.5 s.

What is the latency of Muse Spark Open?

Muse Spark Open had a median time to first token of 0.5 s in our 2026-10-27 run, ranking #14 of 78 models.

How much does Muse Spark Open cost?

Muse Spark Open cost $0.0045 per question on average as billed in our 2026-10-27 run, reasoning tokens included.

What is Muse Spark Open API pricing?

Muse Spark Open is listed at $1.25 per million input tokens and $4.25 per million output tokens on OpenRouter.

What is the context window of Muse Spark Open?

Muse Spark Open accepts up to 1,048,576 tokens of context, according to OpenRouter's model catalogue.

Is Muse Spark Open open source?

Yes. Muse Spark Open is an open-weights model: Meta publishes the weights, so you can run it yourself as well as through an API.

Who makes Muse Spark Open?

Muse Spark Open is made by Meta. We tested it through OpenRouter using the model ID meta/muse-spark-open.

Where can I use Muse Spark Open via API?

Through OpenRouter, Muse Spark Open is served by 6 hosts: BaseTen, Fireworks, Makora, Modal, Nebius, Together.

MetaOpen weightsReleased 15 Oct 2026

Muse Spark Open benchmarks, speed and API pricing

Reviewed by LLM Verifications team · Tested 26 Oct 2026

Compare

Available through OpenRouter on

Makora$1.25 in · $4.25 out
Modal$1.25 in · $4.25 out
Together$1.25 in · $4.25 out
Nebius$1.25 in · $4.25 out
Fireworks$1.25 in · $4.25 out
BaseTen$1.25 in · $4.25 out

Intelligence77.5% correct#9 of 72

Speed220tok/s#7 of 72

Cost$0.0045per question#48 of 72List $1.25 in · $4.25 out per 1M

Verbosity964tokens per question#31 of 72

Summary

Answers 62 of 80 verification questions correctly (77.5%), placing #9 of 72 models tested on the current suite.
Generates 220 output tokens per second, faster than 92% of the models we measure.
Starts responding after 0.5 s (median time to first token), including thinking time.
Costs $0.0045 per question as billed, #7 cheapest of 31 models priced over $1 per 1M tokens.

Specifications

Reasoning: Yes
Input: text, image, video, file, audio
Output: text
Context window: 1M tokens
Weights: Open weights
Knowledge cutoff: —
OpenRouter ID: meta/muse-spark-open
Last tested: 26 Oct 2026

Peer group: 34 models with a blended list price over $1 per 1M tokens (3 input : 1 output). Charts below compare Muse Spark Open with all models; cost and speed charts focus on this peer group.

Intelligence

Verification score: the share of 80 questions from open datasets answered correctly. See the benchmark datasets.

Score vs. cost per question

Muse Spark Open circled; dashed line joins models no cheaper model beats

Score vs. end-to-end response time

Muse Spark Open circled · accurate and quick sits top left

Score vs. tokens per question

Muse Spark Open circled · output tokens, reasoning included

Verification score

All models tested on the current suite

62 more models · see the full leaderboard

Cost

Average cost of one question, split into input, reasoning and answer tokens at each model's list price. Reasoning tokens are billed as output.

Cost per question, by token type

Peer group: blended price over $1

Input Reasoning Answer

Cost per question, as billed

All models · lower is better

1Granite 4.0 Micro$0.000051
2gpt-oss-20b$0.000066
3Granite 4.2 8B$0.000077
4Nova Micro 1.0$0.000087
5Mercury 2.5$0.00011
6Phi 4$0.00012
7gpt-oss-120b$0.00013
8GLM 5.3 Flash$0.00015
9Ministral 3 3B 2512$0.00019
10GPT-6 Luna$0.00025
48Muse Spark Open$0.0045

61 more models · see the full leaderboard

Speed and latency

Median of 3 streamed runs of the same prompt, measured 25 Oct 2026.

Output speed

Peer group (over $1) · higher is better

19 more models · see the full leaderboard

Time to first token

Peer group (over $1) · lower is better

21 more models · see the full leaderboard

End-to-end response time

Peer group (over $1) · lower is better

21 more models · see the full leaderboard

Latency vs. output speed

Muse Spark Open circled · quick to start and fast sits top left

Results by category

Questions answered correctly in each category

Science25/30

Engineering11/15

Medicine6/11

Economics8/9

Law4/6

Humanities & social science8/9

More from Meta

Meta#7Muse Wonder78.8% verification score175 tok/s16.1 s first token$0.021 / question

Meta#40Llama 4 Maverick59.0% verification score13 tok/s0.7 s first token$0.00059 / question

Meta#52Llama 3.3 70B Instruct42.5% verification score42 tok/s0.7 s first token$0.00053 / question

All Meta models →

Compare Muse Spark Open

Head to head with its closest rivals, other Meta models and the top models overall.

Hosts and prices

Every host serving this model through OpenRouter, from OpenRouter's catalogue

Host	Input / 1M	Output / 1M	Context	Max output	Quantization
Makora	$1.25	$4.25	1M	131k	fp4
Modal	$1.25	$4.25	1M	262k	—
Together	$1.25	$4.25	1M	944k	—
Nebius	$1.25	$4.25	1M	944k	fp4
Fireworks	$1.25	$4.25	1M	944k	—
BaseTen	$1.25	$4.25	1M	944k	fp4

Sources

Scores, speed and billed cost are our own measurements. Prices, context window and hosts come from OpenRouter's catalogue on the test date.

Muse Spark Open on OpenRouter: list prices and hosts
Model card on Hugging Face: weights and licence
SuperGPQA (paper): 50 of the questions, ODC-BY 1.0
MMLU-Pro (paper): 30 of the questions, MIT
OpenRouter generation records: where billed cost and native token counts come from
Our methodology and editorial standards

Muse Spark Open: frequently asked questions

How accurate is Muse Spark Open?: Muse Spark Open answered 62 of 80 questions correctly (77.5%) in our 2026-10-27 run, ranking #9 of 78 models.
How fast is Muse Spark Open?: Muse Spark Open generated a median of 220 output tokens per second in our 2026-10-27 run, ranking #7 of 78. Median time to first token was 0.5 s.
What is the latency of Muse Spark Open?: Muse Spark Open had a median time to first token of 0.5 s in our 2026-10-27 run, ranking #14 of 78 models.
How much does Muse Spark Open cost?: Muse Spark Open cost $0.0045 per question on average as billed in our 2026-10-27 run, reasoning tokens included.
What is Muse Spark Open API pricing?: Muse Spark Open is listed at $1.25 per million input tokens and $4.25 per million output tokens on OpenRouter.
What is the context window of Muse Spark Open?: Muse Spark Open accepts up to 1,048,576 tokens of context, according to OpenRouter's model catalogue.
Is Muse Spark Open open source?: Yes. Muse Spark Open is an open-weights model: Meta publishes the weights, so you can run it yourself as well as through an API.
Who makes Muse Spark Open?: Muse Spark Open is made by Meta. We tested it through OpenRouter using the model ID meta/muse-spark-open.
Where can I use Muse Spark Open via API?: Through OpenRouter, Muse Spark Open is served by 6 hosts: BaseTen, Fireworks, Makora, Modal, Nebius, Together.

MetaOpen weightsReleased 15 Oct 2026

Muse Spark Open benchmarks, speed and API pricing

Reviewed by LLM Verifications team · Tested 26 Oct 2026

Compare

Available through OpenRouter on

Makora$1.25 in · $4.25 out
Modal$1.25 in · $4.25 out
Together$1.25 in · $4.25 out
Nebius$1.25 in · $4.25 out
Fireworks$1.25 in · $4.25 out
BaseTen$1.25 in · $4.25 out

Intelligence77.5% correct#9 of 72

Speed220tok/s#7 of 72

Cost$0.0045per question#48 of 72List $1.25 in · $4.25 out per 1M

Verbosity964tokens per question#31 of 72

Summary

Answers 62 of 80 verification questions correctly (77.5%), placing #9 of 72 models tested on the current suite.
Generates 220 output tokens per second, faster than 92% of the models we measure.
Starts responding after 0.5 s (median time to first token), including thinking time.
Costs $0.0045 per question as billed, #7 cheapest of 31 models priced over $1 per 1M tokens.

Specifications

Reasoning: Yes
Input: text, image, video, file, audio
Output: text
Context window: 1M tokens
Weights: Open weights
Knowledge cutoff: —
OpenRouter ID: meta/muse-spark-open
Last tested: 26 Oct 2026

Peer group: 34 models with a blended list price over $1 per 1M tokens (3 input : 1 output). Charts below compare Muse Spark Open with all models; cost and speed charts focus on this peer group.

Intelligence

Verification score: the share of 80 questions from open datasets answered correctly. See the benchmark datasets.

Score vs. cost per question

Muse Spark Open circled; dashed line joins models no cheaper model beats

Score vs. end-to-end response time

Muse Spark Open circled · accurate and quick sits top left

Score vs. tokens per question

Muse Spark Open circled · output tokens, reasoning included

Verification score

All models tested on the current suite

62 more models · see the full leaderboard

Cost

Average cost of one question, split into input, reasoning and answer tokens at each model's list price. Reasoning tokens are billed as output.

Cost per question, by token type

Peer group: blended price over $1

Input Reasoning Answer

Cost per question, as billed

All models · lower is better

1Granite 4.0 Micro$0.000051
2gpt-oss-20b$0.000066
3Granite 4.2 8B$0.000077
4Nova Micro 1.0$0.000087
5Mercury 2.5$0.00011
6Phi 4$0.00012
7gpt-oss-120b$0.00013
8GLM 5.3 Flash$0.00015
9Ministral 3 3B 2512$0.00019
10GPT-6 Luna$0.00025
48Muse Spark Open$0.0045

61 more models · see the full leaderboard

Speed and latency

Median of 3 streamed runs of the same prompt, measured 25 Oct 2026.

Output speed

Peer group (over $1) · higher is better

19 more models · see the full leaderboard

Time to first token

Peer group (over $1) · lower is better

21 more models · see the full leaderboard

End-to-end response time

Peer group (over $1) · lower is better

21 more models · see the full leaderboard

Latency vs. output speed

Muse Spark Open circled · quick to start and fast sits top left

Results by category

Questions answered correctly in each category

Science25/30

Engineering11/15

Medicine6/11

Economics8/9

Law4/6

Humanities & social science8/9

More from Meta

Meta#7Muse Wonder78.8% verification score175 tok/s16.1 s first token$0.021 / question

Meta#40Llama 4 Maverick59.0% verification score13 tok/s0.7 s first token$0.00059 / question

Meta#52Llama 3.3 70B Instruct42.5% verification score42 tok/s0.7 s first token$0.00053 / question

All Meta models →

Compare Muse Spark Open

Head to head with its closest rivals, other Meta models and the top models overall.

Hosts and prices

Every host serving this model through OpenRouter, from OpenRouter's catalogue

Host	Input / 1M	Output / 1M	Context	Max output	Quantization
Makora	$1.25	$4.25	1M	131k	fp4
Modal	$1.25	$4.25	1M	262k	—
Together	$1.25	$4.25	1M	944k	—
Nebius	$1.25	$4.25	1M	944k	fp4
Fireworks	$1.25	$4.25	1M	944k	—
BaseTen	$1.25	$4.25	1M	944k	fp4

Sources

Scores, speed and billed cost are our own measurements. Prices, context window and hosts come from OpenRouter's catalogue on the test date.

Muse Spark Open on OpenRouter: list prices and hosts
Model card on Hugging Face: weights and licence
SuperGPQA (paper): 50 of the questions, ODC-BY 1.0
MMLU-Pro (paper): 30 of the questions, MIT
OpenRouter generation records: where billed cost and native token counts come from
Our methodology and editorial standards

Muse Spark Open: frequently asked questions

How accurate is Muse Spark Open?: Muse Spark Open answered 62 of 80 questions correctly (77.5%) in our 2026-10-27 run, ranking #9 of 78 models.
How fast is Muse Spark Open?: Muse Spark Open generated a median of 220 output tokens per second in our 2026-10-27 run, ranking #7 of 78. Median time to first token was 0.5 s.
What is the latency of Muse Spark Open?: Muse Spark Open had a median time to first token of 0.5 s in our 2026-10-27 run, ranking #14 of 78 models.
How much does Muse Spark Open cost?: Muse Spark Open cost $0.0045 per question on average as billed in our 2026-10-27 run, reasoning tokens included.
What is Muse Spark Open API pricing?: Muse Spark Open is listed at $1.25 per million input tokens and $4.25 per million output tokens on OpenRouter.
What is the context window of Muse Spark Open?: Muse Spark Open accepts up to 1,048,576 tokens of context, according to OpenRouter's model catalogue.
Is Muse Spark Open open source?: Yes. Muse Spark Open is an open-weights model: Meta publishes the weights, so you can run it yourself as well as through an API.
Who makes Muse Spark Open?: Muse Spark Open is made by Meta. We tested it through OpenRouter using the model ID meta/muse-spark-open.
Where can I use Muse Spark Open via API?: Through OpenRouter, Muse Spark Open is served by 6 hosts: BaseTen, Fireworks, Makora, Modal, Nebius, Together.