Grok 4.1 Fast

Grok 4.1 Fast

SpaceXSI
5.0 out of 5 stars
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About

Grok 4.1 Fast is an xAI model designed to deliver advanced tool-calling capabilities with a massive 2-million-token context window. It excels at complex real-world tasks such as customer support, finance, troubleshooting, and dynamic agent workflows. The model pairs seamlessly with the new Agent Tools API, which enables real-time web search, X search, file retrieval, and secure code execution. This combination gives developers the power to build fully autonomous, production-grade agents that plan, reason, and use tools effectively. Grok 4.1 Fast is trained with long-horizon reinforcement learning, ensuring stable multi-turn accuracy even across extremely long prompts. With its speed, cost-efficiency, and high benchmark scores, it sets a new standard for scalable enterprise-grade AI agents.

About

Muse Ember is an efficient multimodal AI model developed by Meta for autonomous agents, software engineering, complex reasoning, and high-volume task automation. The model specializes in repetitive agentic operations such as tool calling, code analysis, information extraction, workflow routing, and document processing. It supports text, images, audio, video, and PDF inputs with a one-million-token context window and a maximum output length of 512,000 tokens. Muse Ember can execute multistep business workflows, analyze large software repositories, perform coding tasks, and interpret visual information from documents and screenshots. Its cost-efficient architecture makes it suitable for multi-agent systems in which larger models handle planning while Muse Ember executes frequent subtasks. The model is available through Meta Model API and Muse Code, with API pricing starting at $0.10 per million input tokens and $0.50 per million output tokens.

Platforms Supported

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

This content is ideal for developers, enterprises, and technical teams seeking to build advanced AI agents that require real-time data access, long-context reasoning, and reliable tool-calling capabilities

Audience

AI developers, autonomous agent developers, software engineers, machine learning engineers, enterprise automation teams, data engineers, AI infrastructure providers, coding assistant developers, business process automation specialists, and organizations seeking cost-efficient multimodal AI, long-context reasoning, automated tool execution, document processing, software engineering assistance, and scalable multi-agent workflows

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 Supported

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

$0.10 per 1M tokens (input)
$0.10 per million input tokens and $0.50 per million output tokens
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 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:

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Pros & Cons from Real Users

Pros

  • Grok 4.1 Fast is one of the most capable agentic AI models available today, combining frontier-level intelligence with blazing speed and exceptional tool-calling performance. Its 2M-token context window enables consistent reasoning over extremely long conversations, multi-turn workflows, and complex planning. Thanks to extensive RL training across diverse simulated environments, the model excels in real-world scenarios such as customer support, finance, research, and autonomous decision-making. Paired with the new Agent Tools API—featuring real-time X search, internet browsing, code execution, file retrieval, and MCP integration—Grok 4.1 Fast can orchestrate multi-step tasks seamlessly and autonomously. Benchmark results reinforce its strengths, outperforming or rivaling leading models across tool calling, long-context reasoning, and multihop search.

Cons

  • Because Grok 4.1 Fast is designed for sophisticated agentic use cases, developers new to tool-calling workflows may face a learning curve when integrating its advanced capabilities. Its reasoning variant is optimized for accuracy rather than instant response time, which may feel slower compared to lightweight chat models. And while pricing is competitive—especially with free access via OpenRouter—the cost of high-volume tool calls may add up for large enterprise workloads once promotional periods end.

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
grok.com

Company Information

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

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Categories

AI Coding Models Supported
AI Models Supported
Foundation Models Supported
Multimodal Models Supported

Categories

AI Coding Models Supported
AI Models Supported
Foundation Models Supported
Multimodal Models Supported

Integrations

C Supported
C# Supported
C++ Supported
CSS Supported
Clawd.run Supported
Doraverse Supported
Elixir Supported
Grok Supported
Java Supported
Laravel Supported
LaunchLemonade Supported
Microsoft Foundry Supported
OpenRouter Supported
R Supported
Ruby Supported
SQL Supported
Scala Supported
Visual Basic Supported
Zo Computer Supported
iMini Supported

Integrations

C Not Supported
C# Not Supported
C++ Not Supported
CSS Not Supported
Clawd.run Not Supported
Doraverse Not Supported
Elixir Not Supported
Grok Not Supported
Java Not Supported
Laravel Not Supported
LaunchLemonade Not Supported
Microsoft Foundry Not Supported
OpenRouter Not Supported
R Not Supported
Ruby Not Supported
SQL Not Supported
Scala Not Supported
Visual Basic Not Supported
Zo Computer Not Supported
iMini Not Supported
Claim Grok 4.1 Fast and update features and information
Claim Grok 4.1 Fast and update features and information
Claim Muse Ember and update features and information
Claim Muse Ember and update features and information