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What is Muse Spark 1.2?

Muse Spark 1.2 is a coding-focused AI model from Meta designed to support advanced software engineering tasks through Muse Code and the Meta Model API. The model builds on Muse Spark 1.1 with improvements in code generation, complex debugging, codebase understanding, and end-to-end developer workflows. Muse Spark 1.2 powers Muse Code, a terminal coding agent that can plan repository changes, write code, validate outputs, and work across large codebases. Muse Code uses persistent async background agents that stay active throughout a session to reduce redundant information gathering and support difficult multi-step work. The runtime uses a local event log where model calls, tool runs, approvals, and edits are appended, making sessions replay-exact and restart-safe. Muse Spark 1.2 was co-trained with Muse Code so the model can take advantage of its toolset, harness workflows, goals, compaction, and subagent architecture. Meta significantly scaled training compute on coding tasks and expanded training environment diversity to improve the model’s engineering capabilities. The model was also trained on long-horizon coding tasks, including whole-repository generation, large end-to-end projects, auto-research, and extended iterative work. Its training approach uses planning, goal conditioning, context compaction, rejection-sampled harness trajectories, and self-improvement data generated with Muse Spark 1.1. Meta also tested Muse Spark 1.2 on long-running GPU kernel optimization workflows where the model wrote, compiled, profiled, and improved Triton kernels over many tool calls. By combining coding-focused training, agentic runtime integration, persistent subagents, long-horizon reasoning, replay-safe execution, and API availability, Muse Spark 1.2 helps developers and AI agents complete complex software engineering work with less intervention.

What is Muse?

Microsoft has unveiled Muse, a groundbreaking generative AI model that is set to revolutionize how gameplay ideas are conceived. Collaborating with Ninja Theory, this World and Human Action Model (WHAM) utilizes data from the game Bleeding Edge, enabling it to understand 3D game environments along with the complexities of physics and player dynamics. This proficiency empowers Muse to produce diverse and coherent gameplay sequences, thereby enhancing the creative workflow for developers. Furthermore, the AI possesses the ability to craft game visuals while predicting controller inputs, thus facilitating a more efficient prototyping and artistic exploration phase in game development. By analyzing over 1 billion images and actions, Muse not only demonstrates its promise for game creation but also for the preservation of gaming history, as it has the ability to resurrect classic titles for modern platforms. Even though it is currently in its early stages and produces outputs at a resolution of 300×180 pixels, Muse represents a significant advancement in utilizing AI to aid in game development, aiming to boost human creativity rather than replace it. As Muse continues to develop, it may pave the way for groundbreaking innovations in gaming and the resurgence of cherished classic games, potentially reshaping the entire gaming landscape.

Media

Media

Integrations Supported

C
C++
Claude Mythos 5
Claude Opus 5
GPT-5.4 mini
GPT-5.6 Terra
GPT-6
Gray Swan
Meta Model API
Objective-C
Odysseus
OpenAI Codex
OpenCode
PowerShell
Rust
SQL
Scala
Solidity
Swift
YAML

Integrations Supported

C
C++
Claude Mythos 5
Claude Opus 5
GPT-5.4 mini
GPT-5.6 Terra
GPT-6
Gray Swan
Meta Model API
Objective-C
Odysseus
OpenAI Codex
OpenCode
PowerShell
Rust
SQL
Scala
Solidity
Swift
YAML

API Availability

Has API

API Availability

Has API

Pricing Information

$1.25 per 1M tokens (input)
$1.25 per million tokens in input, and $4.25 per million tokens of output
Free Version
Free Trial Offered?

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Meta

Date Founded

2004

Company Location

United States

Company Website

meta.ai

Company Facts

Organization Name

Microsoft

Date Founded

1975

Company Location

United States

Company Website

microsoft.com

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