Muse Spark Open

Muse Spark Open

Meta
5.0 out of 5 stars
Qwen3.5

Qwen3.5

Alibaba
Muse Spark Open Qwen3.5

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Muse Spark Open:

About

Muse Spark Open is an open-weight, natively multimodal language model for developers and organizations building AI applications, coding systems, and agentic workflows. The released model has 816 billion total parameters, 42 billion active parameters, and a 1-million-token context window. Teams can download the model weights, run inference through supported engines such as vLLM, SGLang, TensorRT-LLM, Hugging Face Transformers, Apple MLX, llama.cpp, or Unsloth, and customize the model using PyTorch. It supports long-context reasoning, software engineering, coding, tool use, and multimodal inputs. Deployment options include cloud inference through listed API providers or self-hosting on compatible GPU systems; Meta documents a desktop setup using two Apple M5 Ultra Mac Studio computers. The model is released under the Muse Model License with limited commercial terms.
Qwen3.5:

About

Qwen3.5 is a next-generation open-weight multimodal large language model designed to power native vision-language agents. The flagship release, Qwen3.5-397B-A17B, combines a hybrid linear attention architecture with sparse mixture-of-experts, activating only 17 billion parameters per forward pass out of 397 billion total to maximize efficiency. It delivers strong benchmark performance across reasoning, coding, multilingual understanding, visual reasoning, and agent-based tasks. The model expands language support from 119 to 201 languages and dialects while introducing a 1M-token context window in its hosted version, Qwen3.5-Plus. Built for multimodal tasks, it processes text, images, and video with advanced spatial reasoning and tool integration. Qwen3.5 also incorporates scalable reinforcement learning environments to improve general agent capabilities. Designed for developers and enterprises, it enables efficient, tool-augmented, multimodal AI workflows.
Muse Spark Open:

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
Qwen3.5:

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
Muse Spark Open:

Audience

AI developers, machine learning engineers, software engineers, AI researchers, enterprise development teams, and organizations seeking customizable open-weight multimodal models for local inference, autonomous agents, complex coding, and long-context AI applications
Qwen3.5:

Audience

AI researchers, enterprise developers, and organizations seeking an efficient open-weight multimodal foundation model for advanced reasoning, coding, and autonomous agent applications
Muse Spark Open:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported
Qwen3.5:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported
Muse Spark Open:

API

Offers API Not Supported
Qwen3.5:

API

Offers API Supported
Muse Spark Open:

Screenshots and Videos

Qwen3.5:

Screenshots and Videos

Muse Spark Open:

Pricing

$0
Model weights are available at no charge under the Muse Model License, which has limited commercial-use terms. Hosted inference providers set their own usage prices.
Free Version Supported
Free Trial Not Supported
Qwen3.5:

Pricing

Free
Open source
Free Version Supported
Free Trial Not Supported
Muse Spark Open:

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
Qwen3.5:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
Muse Spark Open:

Pros & Cons from Real Users

Pros

  • Meta finally opened up a genuinely frontier-level Muse model. The 1M-token context window and 42B active parameters make it strong enough for large repos, long agent sessions, multimodal work, and complex coding without feeling like a stripped-down open model. The local deployment story is also a huge deal. Being able to run something this capable on two M5 Ultra Mac Studios is impressive, especially for teams that want more control over data, infrastructure, and customization. I also like how much of the stack is open around it. Muse Spark Open works with MLX, vLLM, SGLang, TensorRT-LLM, Transformers, llama.cpp, and Unsloth, and Meta is making the weights available through Hugging Face, SageMaker, Google Cloud Model Garden, and Microsoft Foundry.

Cons

  • Even though it is technically desktop-capable, needing two M5 Ultra Mac Studios for the full local experience is still a serious setup, so most developers will probably use hosted inference instead.
Muse Spark Open:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
Qwen3.5:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
Muse Spark Open:

Company Information

Meta
Founded: 2004
United States
research.meta.ai/blog/muse-spark-open
Qwen3.5:

Company Information

Alibaba
Founded: 1999
China
qwen.ai
Muse Spark Open:

Alternatives

Gemini 4 Hydrogen

Gemini 4 Hydrogen

Google
5.0 out of 5 stars
Qwen3.5:

Alternatives

Muse Spark Open:
Claude Fable 5.2

Claude Fable 5.2

Anthropic
5.0 out of 5 stars
Qwen3.5:
Claude Mythos

Claude Mythos

Anthropic
Muse Spark Open:
Qwen3.5:
Claude Opus 4.5

Claude Opus 4.5

Anthropic
Muse Spark Open:
Inkling

Inkling

Thinking Machines Lab
Qwen3.5:
Muse Spark Open:
Muse Glimmer

Muse Glimmer

Meta
5.0 out of 5 stars
Qwen3.5:
Qwen3.8-Max

Qwen3.8-Max

Alibaba
5.0 out of 5 stars
Muse Spark Open:

Categories

Qwen3.5:

Categories

Muse Spark Open:

Integrations

Together AI Supported
APIFree Not Supported
Alibaba Cloud Model Studio Not Supported
BaseRT Not Supported
Baseten Supported
Claw Code Not Supported
Fireworks AI Supported
Groq Supported
Hugging Face Supported
Microsoft-Decision-1 Not Supported
Modal Supported
Nebius Supported
Ollama Not Supported
OpenClaw Not Supported
OpenRouter Supported
Qwen Not Supported
Qwen3.5-Plus Not Supported
Tev1 Not Supported
ZooClaw Not Supported
vLLM Supported
Qwen3.5:

Integrations

Together AI Supported
APIFree Supported
Alibaba Cloud Model Studio Supported
BaseRT Supported
Baseten Not Supported
Claw Code Supported
Fireworks AI Not Supported
Groq Not Supported
Hugging Face Not Supported
Microsoft-Decision-1 Supported
Modal Not Supported
Nebius Not Supported
Ollama Supported
OpenClaw Supported
OpenRouter Not Supported
Qwen Supported
Qwen3.5-Plus Supported
Tev1 Supported
ZooClaw Supported
vLLM Not Supported
Muse Spark Open:
Claim Muse Spark Open and update features and information
Claim Muse Spark Open and update features and information
Qwen3.5:
Claim Qwen3.5 and update features and information
Claim Qwen3.5 and update features and information