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What is Muse Spark Open?

Muse Spark Open is a large-scale open-weight artificial intelligence model developed by Meta for multimodal understanding, software engineering, autonomous agents, and long-horizon reasoning. Released in October 2026, the model provides downloadable weights that allow developers to deploy and customize it outside Meta's hosted AI services. It uses a mixture-of-experts architecture containing 816 billion total parameters, with approximately 42 billion parameters activated during inference. Its one-million-token context window supports processing extensive documents, large software repositories, and lengthy sequences of instructions and interactions. The model is designed for complex coding workflows involving source code analysis, debugging, feature implementation, application development, and software testing. Its multimodal capabilities enable AI agents to interpret visual information and combine that understanding with reasoning and automated computer interactions. Meta demonstrated the model performing local software development tasks and controlling DaVinci Resolve to analyze video footage and prepare edited content. Muse Spark Open supports on-device deployment using two Apple M5 Ultra Mac Studio computers running the MLX framework, with additional compatibility across AMD, Intel, and NVIDIA hardware. Supported inference frameworks include SGLang, vLLM, TensorRT-LLM, Hugging Face Transformers, llama.cpp, and Unsloth, with optimized GPU kernels for improved processing performance. Developers can customize the model using PyTorch and TorchTitan to adapt its behavior to specialized tasks, organizational requirements, and application workflows. Muse Spark Open is distributed under the Muse Model License with limited commercial terms and is available through Hugging Face, Amazon SageMaker AI, Google Cloud Model Garden, Microsoft Foundry Models, and several hosted API providers.

What is DeepSeek-V4.1-Flash?

DeepSeek-V4.1-Flash is an exceptionally efficient and versatile AI model designed for tackling complex tasks in programming, creativity, agentic functions, and spatial reasoning. Building upon the foundation laid by DeepSeek-V4-Flash, this iteration emphasizes swift output generation while maintaining strong performance on challenging tasks, achieving an impressive rate of over 400 tokens per second, with peak performance reaching around 427 tokens per second in testing environments. The model is adept at managing advanced programming assignments, creating immersive 3D worlds, producing voxel-based projects, and interpreting spatially complex scenes and simulations. Remarkable demonstrations highlight its adaptability through various environments, such as Minecraft-inspired landscapes, traditional Chinese gardens, racing circuits, dungeon explorations, and exploded camera perspectives, showcasing the fusion of coding abilities and spatial understanding. Its sophisticated features make it an excellent option for rapid prototyping, game development, 3D modeling, architectural design, academic inquiries, and a wide array of other technical or artistic projects where quick iteration is essential. Moreover, the model’s innovative functionalities enable it to seamlessly adjust to various project demands, significantly increasing its effectiveness across numerous fields and enhancing collaboration between creative and technical disciplines.

Media

Media

Integrations Supported

Together AI
Baseten
Hugging Face
Modal
Nebius
OpenRouter

Integrations Supported

Together AI
Buda
Cheaper Inference
Cline
ClinePass
DeepSeek
DeepSeek Harness
DeepSeek-V4
Novita AI
OpenClaw
OpenTag
Oxlo.ai
Reasonix
SnapVee Studio
Vercel AI Gateway

API Availability

API Availability

Has API

Pricing Information

$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

Pricing Information

Free
Free Version

Supported Platforms

SaaS
Windows
Mac
On-Prem
Linux

Supported Platforms

SaaS
Windows
Mac
On-Prem
Linux

Customer Service / Support

Not specified

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Meta

Date Founded

2004

Company Location

United States

Company Website

research.meta.ai/blog/muse-spark-open

Company Facts

Organization Name

DeepSeek

Date Founded

2023

Company Location

China

Company Website

deepseek.com

Categories and Features

AI Coding Models

Not specified

AI Models

Not specified

AI Reasoning Models

Not specified

AI Receptionists

Not specified

Foundation Models

Not specified

Large Language Models

Not specified

Multimodal Models

Not specified

Open-Weight AI Models

Not specified

Categories and Features

AI Coding Models

Not specified

AI Models

Not specified

AI Reasoning Models

Not specified

Large Language Models

Not specified

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