# Muse Spark Open Launches

> Meta releases first open-weight AI model for desktop use on Apple M5 Ultra.
- Title: Muse Spark Open Launches · Meta AI Research | Shortify
- Summary: Meta releases first open-weight AI model for desktop use on Apple M5 Ultra. Meta launched Muse Spark Open, an 816B-parameter AI model running on Apple M5…
- Keywords: muse spark open, apple m5 ultra, meta, ai model, open-weight, desktop ai, coding, agentic work, technology, startups, Muse, Spark
- Source: Meta AI Research — https://research.meta.ai/blog/muse-spark-open
- Author: Meta Superintelligence Labs
- Published: 2026-10-15T00:00:00+00:00
- Read time: 1 min
- Topics: muse spark open, apple m5 ultra, meta, ai model, open-weight, desktop ai, coding, agentic work, technology, startups
## Muse Spark Open Launch
Meta releases Muse Spark Open, the most capable US open-weight model with 816B parameters for desktop use.
## Desktop Performance
Runs on two Apple M5 Ultra Mac Studios with 512GB unified memory for 1M-token context windows.
## Key Capabilities
Excels at coding, complex software engineering, multi-step reasoning and long-horizon tasks.
## Available Platforms
Available through Baseten, Fireworks AI, Groq, Modal, Nebius, OpenRouter and Together AI.
## Optimized for Apple
Uses MLX framework for best performance on Mac Studio with M5 Ultra silicon.
## Safety Features
Includes safety post-training and meets Meta Superintelligence Scaling Framework thresholds.
## Key takeaway

Meta launched Muse Spark Open, an 816B-parameter AI model running on Apple M5 Ultra Mac Studios for coding and agentic tasks.