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Muse Spark Open

Muse Spark Open is the most capable open-weight model from a US lab, and is part of our commitment to giving developers control over how and where they choose to build.

Where to deploy Muse Spark Open

Meet Muse Spark Open

Enhanced coding capabilities

Muse Spark Open writes, reviews and ships code with fewer steps and lower latency. Whether you're building coding agents or using AI as a development partner, it's competitive with the best.

Native multimodal perception

Muse Spark Open perceives video, images, and documents, and its visual reasoning runs through a real execution environment instead of scripted steps. Feed it a screenshot or a clip and let it build, so you can focus on shipping features fast.

End-to-end agentic workflows

Build and orchestrate multi-agent workflows with one model. Move from idea to feature quickly and spend time testing, learning, and building instead of configuring. A separate commentary channel lets the model state intent before acting – so you always know what it's doing and why.

Muse Spark

Introducing Muse Spark Open

Muse Spark Open is derived from the Muse Spark model we released in August, with additional safety post-training to make it more robust against misuse as a standalone model without system guardrails.

Muse Spark Open benchmarks

Category

Benchmark

Muse Spark Open (xhigh)

Inkling (xhigh)

Nemotron 3 Ultra (thinking)

Beam

Mistral Large 4

Qwen3.8-2.4T-A95B (xhigh)

GLM 5.3 (max)

Kimi K3 (max)

Agentic

Knowledge & Reasoning

Coding

Multimodal (with tools)

JobBench

MCP-Atlas

GDPval-AA v2

HLE-Diamond (no tools)

SciCode

AA-Omniscience

Terminal-Bench 2.1Terminus 2 agent

DeepSWE 1.1Best available/ Self reported harness

ZeroBench

BabyVision

SimpleVQA

61.8

89.2

1401

26.1

58.5

25

76.4

60

50.0

80.2

73.6

31.1

76.0

1079

11.2

47.0

2

55.1

–

14.0

34.2

52.3

27.2

63.1

1016

8.9

40.3

0

53.9

–

Not supported

Not supported

Not supported

–

78.7

–

–

49.7

13

80.1

44

Not supported

Not supported

Not supported

–

–

1424

–

54.2

-5

–

62

–

–

–

52.7

84.5

1613

17.3

54.1

4

82.0

57

Not supported

Not supported

Not supported

61.4

84.2

1653

16.4

59.0

14

83.9

67

Not supported

Not supported

Not supported

54.3

82.3

1537

22.2

59.5

20

85.0

68

41.0

85.7

71.9

Cookbooks and quickstarts

Read documentation

Quick startYour first working request in under five minutes. Point your existing OpenAI SDK compatible client at Meta Model API.

Multi-agent orchestrationStand up a four profile agentic team that turns a one line product idea into a working SaaS app.

Agent fan-outSpin multiple subagents into isolated worktrees to tackle parallel work without mid-flight collisions.

Computer useGive Muse Spark eyes and a pair of hands and it can build software the way you do.

GitHub agentBuild an autonomous GitHub bot on Meta Model API with Muse Spark and OpenCode.

Search groundingGive your model live access to the web. Add a single tool to your request to get real time information.

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