Muse Spark 1.1

Name: Muse Spark 1.1
Brand: Meta
Price: 1.25 USD
Availability: InStock

Muse Spark is a natively multimodal reasoning model with support for tool-use, visual chain of thought, and multi-agent orchestration.

Source-linked muse Closed weights Released 2026-04-08

API data Report

Input modalitiesT

Output modalitiesT

Input price$1.25/1M tokens

Output price$4.25/1M tokens

Context window1M

Max output32K

Overview

Capabilities and specifications

✓ Reasoning Yes

✓ Tool calling Yes

✓ Structured output Yes

✓ Attachments Yes

✓ Vision input Yes

× Open weights No

Creator: Meta
Model family: muse
Knowledge cutoff: Not documented
License: Not documented
Release date: 2026-04-08
Model ID: meta/muse-spark-1.1

Inference availability

Provider pricing and availability

Provider-specific identifiers, limits, and prices per million tokens.

Report a price

Providers offering Muse Spark 1.1
Provider	Provider model ID	Context	Input	Output	Cache read	Capabilities	Source
Vercel AI Gateway	`meta/muse-spark-1.1`	1.04858M	$1.25	$4.25	$0.15	ReasoningToolsJSON	Docs
LLM Gateway	`muse-spark-1.1`	1.04858M	$1.25	$4.25	$0.15	ReasoningToolsJSON	Docs
Abacus	`muse-spark-1.1`	1M	$1.25	$4.25	$0.15	ReasoningToolsJSON	Docs
EmpirioLabs AI	`muse-spark-1-1`	1M	$1.25	$4.25	$1	ReasoningToolsJSON	Docs
Meta	`muse-spark-1.1`	1M	$1.25	$4.25	$0.15	ReasoningToolsJSON	Docs
OpenRouter	`meta/muse-spark-1.1`	1.04858M	$1.25	$4.25	$0.15	ReasoningToolsJSON	Docs
Merge Gateway	`meta/muse-spark-1.1`	1.04858M	$1.25	$4.25	$0.15	ReasoningTools	Docs

Capability badges appear only when the provider catalog explicitly lists support.

Serving quality

Performance and reliability

Observed serving measurements stay separate from model specifications and are never estimated from price or model size.

Throughput Not reported

Generation speed; higher is faster.

Latency / TTFT Not reported

Time until the first output token arrives.

Uptime Not reported

Successful requests over a measured period.

Performance varies by inference provider, region, and load. Provider-level measurements appear only when a source reports them.

Published evaluations

Benchmarks

Raw results remain attached to their original source and version.

Benchmark registry

Agentic Index - Unversioned - indexTop 8 reported models

Claude Opus 5

55.3

GPT-5.6 Sol

54.0

Anthropic: Claude Fable 5 (batch)

52.8

Claude Fable 5

52.8

Kimi K3

50.1

GPT-5.6 Terra

47.4

Anthropic: Claude Opus 4.8 (batch)

47.2

Muse Spark 1.1

37.5

BabyVision - Unversioned - accuracyTop 1 reported models

Muse Spark 1.1

76.3

CharXiv Reasoning - Unversioned - accuracyTop 3 reported models

Muse Spark 1.1

88.4

Gemini 3.5 Flash

84.2

Gemini 3.1 Pro Preview

83.3

Coding Index - Unversioned - indexTop 8 reported models

Claude Opus 5

78.0

GPT-5.6 Sol

77.4

GPT-5.6 Terra

76.7

Anthropic: Claude Fable 5 (batch)

76.5

Claude Fable 5

76.5

Kimi K3

76.2

OpenAI: GPT-5.5 (batch)

74.9

Muse Spark 1.1

71.3

DeepSWE - 1.1 - resolve rateTop 4 reported models

GPT-5.6 Sol

72.7

GPT-5.6 Terra

69.6

GPT-5.6 Luna

67.2

Muse Spark 1.1

53.3

Design Arena: 3d - Unversioned - eloTop 8 reported models

Kimi K3

1456.0

Claude Opus 5

1384.0

Anthropic: Claude Fable 5 (batch)

1373.0

Claude Fable 5

1373.0

Z.ai: GLM 5.2

1366.0

Z.ai: GLM 5.1

1336.0

Anthropic: Claude Opus 4.6 (batch)

1332.0

Muse Spark 1.1

1299.0

Design Arena: agenticgamedev - Unversioned - eloTop 8 reported models

Anthropic: Claude Fable 5 (batch)

1296.0

Claude Fable 5

1296.0

Anthropic: Claude Opus 4.8 (batch)

1259.0

Anthropic: Claude Opus 4.8

1259.0

Anthropic: Claude Opus 4.7 (batch)

1254.0

Anthropic: Claude Opus 4.7

1254.0

Anthropic: Claude Sonnet 5 (batch)

1238.0

Muse Spark 1.1

1190.0

Design Arena: asciiart - Unversioned - eloTop 7 reported models

Anthropic: Claude Fable 5 (batch)

1364.0

Claude Fable 5

1364.0

Anthropic: Claude Opus 4.7 (batch)

1324.0

Anthropic: Claude Opus 4.7

1324.0

Muse Spark 1.1

1322.0

Google: Gemini 3.1 Pro Preview (batch)

1309.0

Gemini 3.1 Pro Preview

1309.0

Design Arena: codecategories - Unversioned - eloTop 8 reported models

Kimi K3

1418.0

Claude Opus 5

1358.0

Z.ai: GLM 5.2

1346.0

Anthropic: Claude Fable 5 (batch)

1340.0

Claude Fable 5

1340.0

Anthropic: Claude Opus 4.6 (batch)

1324.0

Anthropic: Claude Opus 4.6

1324.0

Muse Spark 1.1

1304.0

Design Arena: dataviz - Unversioned - eloTop 8 reported models

Kimi K3

1382.0

Claude Opus 5

1378.0

Z.ai: GLM 5.1

1366.0

Google: Gemini 3.6 Flash (batch)

1350.0

Gemini 3.6 Flash

1350.0

Anthropic: Claude Fable 5 (batch)

1349.0

Claude Fable 5

1349.0

Muse Spark 1.1

1298.0

Design Arena: gamedev - Unversioned - eloTop 8 reported models

Anthropic: Claude Fable 5 (batch)

1393.0

Claude Fable 5

1393.0

Z.ai: GLM 5.2

1358.0

Anthropic: Claude Sonnet 5 (batch)

1352.0

Claude Sonnet 5

1352.0

OpenAI: GPT-5.5 (batch)

1345.0

GPT-5.5

1345.0

Muse Spark 1.1

1323.0

Design Arena: godotgamedev - Unversioned - eloTop 8 reported models

Anthropic: Claude Fable 5 (batch)

1349.0

Claude Fable 5

1349.0

Anthropic: Claude Opus 4.7 (batch)

1270.0

Anthropic: Claude Opus 4.7

1270.0

xAI: Grok 4.5

1270.0

Anthropic: Claude Sonnet 5 (batch)

1269.0

Claude Sonnet 5

1269.0

Muse Spark 1.1

1143.0

Design Arena: htmlslides - Unversioned - eloTop 8 reported models

Anthropic: Claude Fable 5 (batch)

1260.0

Claude Fable 5

1260.0

Anthropic: Claude Opus 4.7 (batch)

1244.0

Anthropic: Claude Opus 4.7

1244.0

Anthropic: Claude Opus 4.8 (batch)

1239.0

Anthropic: Claude Opus 4.8

1239.0

Anthropic: Claude Sonnet 5 (batch)

1234.0

Muse Spark 1.1

1216.0

Design Arena: python-pptxslides - Unversioned - eloTop 8 reported models

Kimi K3

1380.0

Anthropic: Claude Opus 4.7 (batch)

1336.0

Anthropic: Claude Opus 4.7

1336.0

Anthropic: Claude Fable 5 (batch)

1301.0

Claude Fable 5

1301.0

Anthropic: Claude Opus 4.8 (batch)

1298.0

Anthropic: Claude Opus 4.8

1298.0

Muse Spark 1.1

1170.0

Design Arena: uicomponent - Unversioned - eloTop 8 reported models

Kimi K3

1413.0

Claude Opus 5

1406.0

Anthropic: Claude Fable 5 (batch)

1350.0

Claude Fable 5

1350.0

Anthropic: Claude Opus 4.7 (batch)

1339.0

Anthropic: Claude Opus 4.7

1339.0

Z.ai: GLM 5.2

1334.0

Muse Spark 1.1

1313.0

Design Arena: webapps - Unversioned - eloTop 8 reported models

Kimi K3

1329.0

Anthropic: Claude Fable 5 (batch)

1305.0

Claude Fable 5

1305.0

Anthropic: Claude Sonnet 5 (batch)

1304.0

Claude Sonnet 5

1304.0

Anthropic: Claude Opus 4.7 (batch)

1303.0

Anthropic: Claude Opus 4.7

1303.0

Muse Spark 1.1

1254.0

Design Arena: website - Unversioned - eloTop 8 reported models

Kimi K3

1375.0

Claude Opus 5

1343.0

Z.ai: GLM 5.2

1340.0

Anthropic: Claude Fable 5 (batch)

1323.0

Claude Fable 5

1323.0

xAI: Grok 4.5

1323.0

Google: Gemini 3.6 Flash (batch)

1322.0

Muse Spark 1.1

1296.0

Finance Agent - v2 - accuracyTop 1 reported models

Muse Spark 1.1

57.2

Humanity's Last Exam - Unversioned - accuracyTop 7 reported models

Claude Fable 5

64.5

Muse Spark 1.1

62.1

GPT-5.4 Pro

58.7

Claude Opus 4.8

57.9

GPT-5.5 Pro

57.2

Claude Opus 4.7

54.7

GPT-5.5

52.2

Intelligence Index - Unversioned - indexTop 8 reported models

Claude Opus 5

60.7

Anthropic: Claude Fable 5 (batch)

59.9

Claude Fable 5

59.9

GPT-5.6 Sol

58.9

Kimi K3

57.1

Anthropic: Claude Opus 4.8 (batch)

55.7

Anthropic: Claude Opus 4.8

55.7

Muse Spark 1.1

50.6

JobBench - Unversioned - success rateTop 1 reported models

Muse Spark 1.1

54.7

MCP Atlas - Unversioned - success rateTop 6 reported models

Muse Spark 1.1

88.1

Gemini 3.5 Flash

83.6

Gemini 3.1 Pro Preview

78.2

Qwen3.7 Max

76.4

GPT-5.5

75.3

MiniMax-M3

74.2

OSWorld-Verified - Unversioned - success rateTop 7 reported models

Claude Fable 5

85.0

Claude Opus 4.8

83.4

Claude Sonnet 5

81.2

Muse Spark 1.1

80.8

GPT-5.5

78.7

Claude Sonnet 4.6

78.5

Gemini 3.5 Flash

78.4

SWE-Bench Pro - Unversioned - resolve rateTop 8 reported models

Claude Fable 5

80.3

Claude Opus 4.8

69.2

Grok 4.5

64.7

GPT-5.6 Sol

64.6

Claude Opus 4.7

64.3

GPT-5.6 Terra

63.4

Claude Sonnet 5

63.2

Muse Spark 1.1

61.5

Terminal-Bench - 2.1 - success rateTop 7 reported models

GPT-5.6 Sol

88.8

Claude Fable 5

88.0

GPT-5.6 Terra

87.4

GPT-5.6 Luna

84.7

Grok 4.5

83.3

Muse Spark 1.1

80.0

LongCat-2.0

70.8

Toolathlon-Verified - Unversioned - success rateTop 1 reported models

Muse Spark 1.1

75.6

Catalog activity

Recent record changes

Detected changes from successful source imports.

Full change log

Jul 30, 2026Context Length1048576 → 1000000

Jul 30, 2026Context Length1000000 → 1048576

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Jul 26, 2026Context Length1048576 → 1000000

Jul 26, 2026Context Length1000000 → 1048576

Jul 25, 2026Context Length1048576 → 1000000

Jul 25, 2026Context Length1000000 → 1048576

Public API

Use this record

Fetch the complete source-linked model record without an API key.

API documentation

Endpoint

GET https://www.modelbench.lol/api/v1/models/meta/muse-spark-1.1

curl

curl "https://www.modelbench.lol/api/v1/models/meta/muse-spark-1.1"