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
Input Price (Auto)
$1.25/1M
Output Price (Auto)
$4.25/1M
Cache Read (Auto)
$0.15/1M
Capabilities
Benchmarks
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
Models Arena
UI Component
1390
Elo
62.2%
Win
134.5s
Avg Time
#3
Rank
3D
1377
Elo
61.7%
Win
159.4s
Avg Time
#8
Rank
Game Development
1361
Elo
59.8%
Win
191.9s
Avg Time
#10
Rank
Website
1359
Elo
60.7%
Win
187.0s
Avg Time
#1
Rank
Data Visualization
1330
Elo
57.1%
Win
151.5s
Avg Time
#7
Rank
Agents Arena
Full Stack
1313
Elo
55.7%
Win
N/A
Avg Time
#5
Rank
Web Apps
1310
Elo
56.4%
Win
N/A
Avg Time
#4
Rank
Updated Sep 11, 2026, 11:31 PM · Matched as Muse Spark 1.3
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