Open-weight model
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
Muse Spark Open writes, reviews and ships code with fewer steps and lower latency. Whether you are building coding agents or using AI as a development partner, it is competitive with the best.
Muse Spark Open perceives video, images and documents, and its visual reasoning runs through a real execution environment instead of scripted steps.
Build and orchestrate multi-agent workflows with one model. A separate commentary channel lets the model state intent before acting, so you always know what it is doing and why.
Muse Spark Open benchmarks
| Category | Benchmark | Muse Spark Open | Inkling | Nemotron 3 Ultra | Beam | Mistral Large 4 | Qwen3.8-2.4T | GLM 5.3 | Kimi K3 |
|---|---|---|---|---|---|---|---|---|---|
| Agentic | JobBench | 61.8 | 31.1 | 27.2 | – | – | 52.7 | 61.4 | 54.3 |
| MCP-Atlas | 89.2 | 76.0 | 63.1 | 78.7 | – | 84.5 | 84.2 | 82.3 | |
| GDPval-AA v2 | 1401 | 1079 | 1016 | – | 1424 | 1613 | 1653 | 1537 | |
| HLE-Diamondno tools | 26.1 | 11.2 | 8.9 | – | – | 17.3 | 16.4 | 22.2 | |
| Knowledge & Reasoning | SciCode | 58.5 | 47.0 | 40.3 | 49.7 | 54.2 | 54.1 | 59.0 | 59.5 |
| AA-Omniscience | 25 | 2 | 0 | 13 | -5 | 4 | 14 | 20 | |
| Terminal-Bench 2.1Terminus 2 agent | 76.4 | 55.1 | 53.9 | 80.1 | – | 82.0 | 83.9 | 85.0 | |
| DeepSWE 1.1Best available harness | 60 | – | – | 44 | 62 | 57 | 67 | 68 | |
| Coding | ZeroBench | 50.0 | 14.0 | Not supported | Not supported | – | Not supported | Not supported | 41.0 |
| BabyVision | 80.2 | 34.2 | Not supported | Not supported | – | Not supported | Not supported | 85.7 | |
| Multimodal (with tools) | SimpleVQA | 73.6 | 52.3 | Not supported | Not supported | – | Not supported | Not supported | 71.9 |
Build with it
Cookbooks and quickstarts
Quick start
Your first working request in under five minutes. Point your existing OpenAI SDK-compatible client at Meta Model API.
Learn moreMulti-agent orchestration
Stand up a four-profile agentic team that turns a one-line product idea into a working SaaS app.
Learn moreAgent fan-out
Spin multiple subagents into isolated worktrees to tackle parallel work without mid-flight collisions.
Learn moreComputer use
Give Muse Spark eyes and a pair of hands, then let it build software the way you do.
Learn moreGitHub agent
Build an autonomous GitHub bot on Meta Model API with Muse Spark and OpenCode.
Learn moreSearch grounding
Give your model live access to the web. Add a single tool to your request to get real-time information.
Learn more