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What is Solar Pro 4?

Solar Pro 4 is a sophisticated AI model crafted to handle practical tasks such as analyzing documents, executing commands, and generating deliverables, halting its operations when evidence is lacking. This model excels in managing large and complex workloads that involve multiple documents, executing terminal commands, and orchestrating several tool interactions across various steps. With an impressive 512K context window and the ability to produce up to 128K output tokens, it allows users to integrate contracts, reports, and data files into one cohesive workflow without splitting them apart. It supports input and output in English, Korean, and Japanese, giving users the option to tailor the reasoning depth for either detailed analysis or quick, real-time responses. Solar Pro 4 is designed for accuracy, ensuring that it delivers consistent values and conclusions across lengthy documents, multi-step tool applications, and terminal operations, including various deliverables like Excel files, detailed reports, and presentation slides. In addition, its architecture promotes teamwork by enabling multiple users to collaborate on different components of a project simultaneously, significantly boosting overall productivity and efficiency. This innovative model redefines how teams approach complex tasks, making it an invaluable asset in diverse working environments.

What is Grok 4.1 Fast?

Grok 4.1 Fast is xAI’s state-of-the-art tool-calling model built to meet the needs of modern enterprise agents that require long-context reasoning, fast inference, and reliable real-world performance. It supports an expansive 2-million-token context, allowing it to maintain coherence during extended conversations, research tasks, or multi-step workflows without losing accuracy. xAI trained the model using real-world simulated environments and broad tool exposure, resulting in extremely strong benchmark performance across telecom, customer support, and autonomy-driven evaluations. When integrated with the Agent Tools API, Grok can combine web search, X search, document retrieval, and code execution to produce final answers grounded in real-time data. The model automatically determines when to call tools, how to plan tasks, and which steps to execute, making it capable of acting as a fully autonomous agent. Its tool-calling precision has been validated through multiple independent evaluations, including the Berkeley Function Calling v4 benchmark. Long-horizon reinforcement learning allows it to maintain performance even across millions of tokens, which is a major improvement over previous generations. These strengths make Grok 4.1 Fast especially valuable for enterprises that rely on automation, knowledge retrieval, or multi-step reasoning. Its low operational cost and strong factual correctness give developers a practical way to deploy high-performance agents at scale. With robust documentation, free introductory access, and native integration with the X ecosystem, Grok 4.1 Fast enables a new class of powerful AI-driven applications.

Media

Media

Integrations Supported

OpenRouter
C
CSS
Clawd.run
Doraverse
Elixir
FastRouter
Go
Grok
JavaScript
Julia
Laravel
Microsoft Foundry
Microsoft Foundry Models
R
SQL
Scala
SuperGrok
Visual Basic
Zo Computer

Integrations Supported

OpenRouter
C
CSS
Clawd.run
Doraverse
Elixir
FastRouter
Go
Grok
JavaScript
Julia
Laravel
Microsoft Foundry
Microsoft Foundry Models
R
SQL
Scala
SuperGrok
Visual Basic
Zo Computer

API Availability

Has API

API Availability

Has API

Pricing Information

$0.03 per 1M tokens
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

Upstage

Date Founded

2020

Company Location

United States

Company Website

www.upstage.ai/blog/en/solar-pro-4

Company Facts

Organization Name

SpaceXAI

Date Founded

2023

Company Location

United States

Company Website

grok.com

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