Models Model details

Meta

Meta: Muse Spark 1.3

meta/muse-spark-1.3

Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows. It is designed to keep track of information across extended tasks, work through conflicting inputs, and request clarification or confirmation when needed, with an emphasis on concise execution.

Input
$1.25

/ 1M tokens

Output
$4.25

/ 1M tokens

Context window
1.05M

tokens

Limits

Context

1,048,576

tokens

Max output

943,718

90% of the context window

Model facts

Author

Meta

Tokenizer

Other

Modality

Text + Image + File + Video -> Text

Created

Sep 2, 2026

Reasoning

RequiredDefault MediumMaxXhighHighMediumLowMinimal

Publication status

Hugging Face: not mappedLicense: not publishedParameter count: not published

Modalities

Input · TextInput · ImageInput · VideoInput · FileOutput · Text

Generation controls

Include reasoningMax tokensReasoningReasoning effortRepetition penaltyResponse formatStructured outputsTemperatureTool choiceToolsTop kTop p

Capability scores

55.5
Agentic index

Better than 95% of models compared

75.8
Coding index

Better than 88% of models compared

48.1
Intelligence index

Better than 93% of models compared

Agent tasks

Category performance

Full-stack apps
Top 9%

1312 Elo

60.8% win

Web apps
Top 5%

1288 Elo

54.6% win

Slide decks
Top 40%

1244 Elo

51.4% win

Mobile apps
Top 29%

1217 Elo

47.6% win

Godot games
Top 24%

1241 Elo

45.8% win

Creative tasks

Category performance

3D
Top 6%

1397 Elo

63.5% win

Websites
Top 2%

1357 Elo

58.2% win

Data visualization
Top 8%

1343 Elo

58.1% win

UI components
Top 4%

1351 Elo

57.6% win

Code
Top 5%

1354 Elo

57.3% win

Games
Top 9%

1345 Elo

56.0% win

ASCII art
Top 9%

1283 Elo

54.0% win

SVG
Top 3%

1323 Elo

54.0% win