+
+

Related Products

  • Google AI Studio
    41 Ratings
    Visit Website
  • Checksum.ai
    2 Ratings
    Visit Website
  • Retool
    598 Ratings
    Visit Website
  • Runpod
    230 Ratings
    Visit Website
  • BAND
    3 Ratings
    Visit Website
  • IONOS Cloud GPU Servers
    45,340 Ratings
    Visit Website
  • FinOpsly
    3 Ratings
    Visit Website
  • Daylight
    15 Ratings
    Visit Website
  • KrakenD
    76 Ratings
    Visit Website
  • Convesio
    63 Ratings
    Visit Website

About

Grok Code Fast 1 is a high-speed, economical reasoning model designed specifically for agentic coding workflows. Unlike traditional models that can feel slow in tool-based loops, it delivers near-instant responses, excelling in everyday software development tasks. Built from scratch with a programming-rich corpus and refined on real-world pull requests, it supports languages like TypeScript, Python, Java, Rust, C++, and Go. Developers can use it for everything from zero-to-one project building to precise bug fixes and codebase Q&A. With optimized inference and caching techniques, it achieves impressive responsiveness and a 90%+ cache hit rate when integrated with partners like GitHub Copilot, Cursor, and Cline. Offered at just $0.20 per million input tokens and $1.50 per million output tokens, Grok Code Fast 1 strikes a strong balance between speed, performance, and affordability.

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.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

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

Audience

Grok Code Fast 1 is designed for developers, engineering teams, and coding platform providers who need a fast, cost-effective AI model optimized for real-world software development

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

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$0.20 per million input tokens
$0.20 per million input tokens
$1.50 per million output tokens
$0.02 per million cached tokens
Free Version Supported
Free Trial Supported

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

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

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5

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.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

SpaceXSI
Founded: 2023
United States
x.ai

Company Information

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

Alternatives

JetBrains Junie

JetBrains Junie

JetBrains

Alternatives

Agent 3

Agent 3

Replit
Claude Sonnet 4

Claude Sonnet 4

Anthropic
Grok 4.5

Grok 4.5

SpaceXSI
Inkling

Inkling

Thinking Machines Lab
DeepSeek-V2

DeepSeek-V2

DeepSeek

Categories

Agentic AI Supported
AI Coding Agents Supported
AI Coding Models Supported
AI Models Supported

Categories

Integrations

OpenRouter Supported
C Supported
C# Supported
Cursor Supported
Dessix Supported
Devin Desktop Supported
Fireworks AI Not Supported
GitHub Supported
Go Supported
Groq Not Supported
Hugging Face Not Supported
Kilo Code Supported
Laravel Supported
Microsoft Foundry Models Supported
Nebius Not Supported
OpenCode Supported
Python Supported
Rust Supported
Visual Studio Supported
Visual Studio Code Supported

Integrations

OpenRouter Supported
C Not Supported
C# Not Supported
Cursor Not Supported
Dessix Not Supported
Devin Desktop Not Supported
Fireworks AI Supported
GitHub Not Supported
Go Not Supported
Groq Supported
Hugging Face Supported
Kilo Code Not Supported
Laravel Not Supported
Microsoft Foundry Models Not Supported
Nebius Supported
OpenCode Not Supported
Python Not Supported
Rust Not Supported
Visual Studio Not Supported
Visual Studio Code Not Supported
Claim Grok Code Fast 1 and update features and information
Claim Grok Code Fast 1 and update features and information
Claim Muse Spark Open and update features and information
Claim Muse Spark Open and update features and information