Muse Spark 1.1

Name: Muse Spark 1.1
Author: Meta

Multimodal

Meta

Muse Spark 1.1 is Meta's first model in the Muse Spark family, designed for agentic and multimodal tasks with a 1M token context window. It leads the MCP Atlas benchmark and ranks highly on OSWorld-Verified and Terminal-Bench 2.1.

Key Specifications

Parameters

Context

1.0M

Release Date

July 9, 2026

Average Score

84.3%

API Documentation Research Paper Results Blog

Timeline

Key dates in the model's history

Announcement

July 9, 2026

Last Update

August 27, 2026

Technical Specifications

Parameters

Training Tokens

Knowledge Cutoff

Family

Capabilities

MultimodalZeroEval

Pricing & Availability

Input (per 1M tokens)

$1.25

Output (per 1M tokens)

$4.25

Max Input Tokens

1.0M

Max Output Tokens

131.1K

Supported Features

Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning

Benchmark Results

Model performance metrics across various tests and benchmarks

Other Tests

Specialized benchmarks

CharXiv-R

1,000 CharXiv validation chart-reasoning questions; gpt-oss-120b high as judge. • Self-reported

88.0%

MCP Atlas

Results sourced from Scale AI. • Self-reported

88.0%

OSWorld-Verified

361-task split excluding Google Drive tasks; GUI-only agent; one attempt per task. • Self-reported

81.0%

Terminal-Bench 2.1

Bash-tool-only harness; pass@1 averaged over 5 attempts on 89 tasks. • Self-reported

80.0%

License & Metadata

License

proprietary

Announcement Date

July 9, 2026

Last Updated

August 27, 2026

Compare Muse Spark 1.1

All comparisons

vs Muse Spark 1.2 vs GLM-5.3 vs Gemini 3.7 Flash vs DeepSeek-V4-Pro-0813 vs Gemini 3.6 Flash vs Nemotron 3.5 Lightning (30B A3B)vs DeepSeek-V4-Flash-0423 vs GPT-5.1 Thinking

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