Muse Spark 1.2

Closed Source

Closed Weights

Parameters

Undisclosed

Context Length

1.05M

Modality

Multimodal

Architecture

Undisclosed

License

Proprietary

Release Date

5 Aug 2026

Knowledge Cutoff

API Pricing (per 1M)

Input: $1.25 · Output: $4.25

Evaluation Benchmarks

Rank

#22

Benchmark	Score	Rank
General Text Text Arena	max 1499	5
Reasoning LiveBench Reasoning	max 0.90	7
General LiveBench Global	max 0.78	12
LiveBench Average LiveBench Average	max 0.78	12
Agentic Coding LiveBench Agentic	max 0.58	14
Mathematics LiveBench Mathematics	max 0.91	18
Intelligence Index Artificial Analysis	max 0.47	19
Data Analysis LiveBench Data Analysis	max 0.76	20
Coding LiveBench Coding	max 0.78	24
Agentic Index Artificial Analysis	max 0.44	24
Coding Index Artificial Analysis	max 0.72	28
Web Development WebDev Arena	max 1534	30
Agent Arena Agent Arena	max 0.85	30

Rankings

Overall Rank

#22

Coding Rank

#35

About Muse Spark 1.2

Muse Spark 1.2 is a frontier multimodal reasoning model developed by Meta for complex agentic workflows and multi-step problem solving. It accepts text, images, video, audio, and documents across a 1M token context window.

Technical Specifications

Architecture specifications are undisclosed for proprietary models.

About Llama 4

Meta's Llama 4 model family implements a Mixture-of-Experts (MoE) architecture for efficient scaling. It features native multimodality through early fusion of text, images, and video. This iteration also supports significantly extended context lengths, with models capable of processing up to 10 million tokens.