Grok 4.1 Fast

Grok 4.1 Fast

SpaceXAI
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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

Meta Model API is a new developer API for building with Muse Spark 1.1, Meta’s multimodal reasoning model built for agentic tasks, coding, tool use, computer use, and multimodal understanding. Now in public preview, it gives developers a way to access Muse Spark 1.1 through an OpenAI-compatible package, making it easier to point existing clients at the API, keep the same code structure, and set the model to muse-spark-1.1. Muse Spark 1.1 is designed for personal agentic tasks that require planning and orchestration across external apps and services, with the ability to generalize to new native tools, MCP servers, and custom skills. As a main agent, it can gather context, make a plan, and delegate execution across parallel subagents; as a subagent, it follows its role, understands available tools, and knows when to escalate back. The model can actively manage a 1 million-token context window, remember actions, retrieve information from much earlier work, and compact context.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

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

Developers and anyone needing a multimodal model API for coding agents, tool-using workflows, computer use, and long-context automation

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

$1.25 per 1M tokens
Free Version
Free Trial

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:

Review this Software

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
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

SpaceXAI
Founded: 2023
United States
grok.com

Company Information

Meta
United States
developer.meta.com/ai/products/meta-model-api/

Alternatives

Alternatives

Grok 4.5

Grok 4.5

SpaceXAI
Grok 4.7

Grok 4.7

SpaceXAI

Categories

Categories

Integrations

OpenClaw
C
Claude Agent SDK
Clojure
Elixir
Java
JavaScript
LlamaIndex
Microsoft Foundry Models
Muse Spark 1.1
Muse Spark 1.2
OpenAI
OpenAI Agents SDK
OpenAI Codex
PHP
R
Ruby
SQL
SuperGrok
TypeScript

Integrations

OpenClaw
C
Claude Agent SDK
Clojure
Elixir
Java
JavaScript
LlamaIndex
Microsoft Foundry Models
Muse Spark 1.1
Muse Spark 1.2
OpenAI
OpenAI Agents SDK
OpenAI Codex
PHP
R
Ruby
SQL
SuperGrok
TypeScript
Claim Grok 4.1 Fast and update features and information
Claim Grok 4.1 Fast and update features and information
Claim Meta Model API and update features and information
Claim Meta Model API and update features and information