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Muse Spark 1.3

meta/muse-spark-1.3
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Muse Spark 1.3

meta/muse-spark-1.3

Meta's Muse Spark 1.3 is a frontier multimodal reasoning model for long-horizon coding and agentic workflows, with strong gains in computer use, browsing, professional tool use, codebase understanding, instruction following, and million-token retrieval. It accepts text, images, audio, video, and files, supports tool calling and structured output, and always reasons before answering.

Added Sep 2, 2026

Context Window

1.0M

Max Output

N/A

Avg output tokens (7d)

735 tokens

57%

Input Price (Auto)

$1.25/1M

Output Price (Auto)

$4.25/1M

Cache Read (Auto)

$0.15/1M

Capabilities

Benchmarks

Performance metrics and benchmarks

Sourced from Design Arena.

Best Category

UI Component

Best Elo

1390

Best Rank Percentile

Top 2%

Ranking Distribution

8,334 battles

60%

45%

30%

15%

0%

22.3%

First

43.4%

Second

28.2%

Third

6.1%

Fourth

Category Performance

Elo
Rank
3DTop 5%Data VizTop 4%Game DevTop 6%UITop 2%WebsiteTop 1%

Models Arena

UI Component

Top 2%

1390

Elo

62.2%

Win

134.5s

Avg Time

#3

Rank

3D

Top 5%

1377

Elo

61.7%

Win

159.4s

Avg Time

#8

Rank

Game Development

Top 6%

1361

Elo

59.8%

Win

191.9s

Avg Time

#10

Rank

Website

Top 1%

1359

Elo

60.7%

Win

187.0s

Avg Time

#1

Rank

Data Visualization

Top 4%

1330

Elo

57.1%

Win

151.5s

Avg Time

#7

Rank

Agents Arena

Full Stack

Top 11%

1313

Elo

55.7%

Win

N/A

Avg Time

#5

Rank

Web Apps

Top 10%

1310

Elo

56.4%

Win

N/A

Avg Time

#4

Rank

Updated Sep 11, 2026, 11:31 PM · Matched as Muse Spark 1.3

Design Arena

Providers

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