Announcing the Grok 4 Fast Models from xAI: Now Available in Azure AI Foundry

 These models, grok-4-fast-reasoning and grok-4-fast-non-reasoning, empower developers with distinct approaches to suit their application needs. Each model brings advanced capabilities such as structured outputs, long-context processing, and seamless integration with enterprise-grade security and governance. 

This release marks a significant step toward scalable, agentic AI systems that orchestrate tools, APIs, and domain data with low latency. Leveraging the Grok 4 Fast models within Azure AI Foundry Models accelerates the development of intelligent applications that combine speed, flexibility, and compliance. The unified model experience, paired with Azure’s enterprise controls, positions the Grok 4 Fast models as foundational technologies for next-generation AI-powered workflows. 

Why use the Grok 4 Fast Models on Azure 

Modern AI applications are increasingly agentic—capable of orchestrating tools, APIs, and domain data at low latency. The Grok 4 Fast models were designed for these patterns: fast, intelligent, and agent-ready, enabling parallel tool use, JSON-structured outputs, and image input for multimodal understanding. Azure AI Foundry enhances these models with enterprise controls (RBAC, private networking, customer-managed keys), observability and evaluations, and first-party hosting through Foundry Models—helping teams move confidently from prototype to production. 

Beyond that, using the Grok 4 Fast models on Azure offers the following: 

• Global scalability and reliability – Azure’s worldwide infrastructure supports resilient, high-availability deployments across multiple regions. 

• Integrated security and compliance – Enterprise-grade identity management, network isolation, encryption at rest and in transit, and compliance certifications help safeguard sensitive data and comply with regulatory requirements. 

• Unified management experience – Centralized monitoring, governance, and cost controls through Azure Portal and Azure Resource Manager simplify operations and oversight. 

• Native integration across Azure services – Easily connect to data sources, analytics, and other services like Azure Synapse, Cosmos DB, and Logic Apps for end-to-end solutions. 

• Enterprise support and SLAs – Azure delivers 24/7 support, service-level agreements, and best-in-class reliability for mission-critical workloads. 

By building withDeploying Grok 4 Fast models throughon Azure, enables organizations tocan build robust, secure, and scalable AI applications with confidence and agility. 

Key capabilities 

The Grok 4 Fast models introduce a suite of advanced features designed to enhance agentic workflows and multimodal integration. With flexible model choices and powerful context handling, the Grok 4 Fast models are engineered for efficiency, scalability, and seamless deployment. 

• Choose reasoning level by selecting which Grok 4 Fast model to use: 

• • grok-4-fast-reasoning: Optimized for fast reasoning in agentic workflows. 

• • grok-4-fast-non-reasoning: Uses the same underlying weights but is constrained by a non-reasoning system prompt, offering a streamlined approach for specific tasks. 

• Multimodal: Provides image understanding when deployed with Grok image tokenizer. 

• Tool use & structured outputs: Enables parallel function calling and supports JSON schemas for predictable integration. 

• Long context: Supports approximately 131K tokens for deep, comprehensive understanding. 

• Efficient H100 performance: Designed to run efficiently on H100 GPUs for agentic search and real-time orchestration. 

Collectively, these features make the Grok 4 Fast models a robust and versatile solution for developers and enterprises looking to push the boundaries of AI-powered workflows. 

What you can do with the Grok 4 Fast models 

Building on the advanced capabilities of the Grok 4 Fast models, developers can unlock innovative solutions across a wide variety of applications. The following use cases highlight how these models streamline complex workflows, maximize efficiency, and accelerate intelligent automation with robust, scalable AI. 

• Real-time agentic task orchestration : Automate and coordinate multi-step processes across systems with fast, flexible reasoning for dynamic business operations. 

• Multimodal document analysis : Extract insights and process information from both text and images for comprehensive, context-aware understanding. 

• Enterprise search and knowledge retrieval : Leverage long-context support for enhanced semantic search, surfacing relevant information from massive data repositories. 

• Parallel tool integration : Invoke multiple APIs and functions simultaneously, enabling sophisticated workflows with structured, predictable outputs. 

• Scalable conversational AI : Deploy high-capacity virtual agents capable of handling extended dialogues and nuanced queries with low latency. 

• Customizable decision support- : Empower users with AI-driven recommendations and scenario analysis tailored to organizational needs and governance requirements. 

With the Grok 4 Fast models, developers are equipped to build and iterate on next-generation AI solutions, leveraging powerful tools and streamlined deployment workflows. Start shaping the future of intelligent applications by harnessing the speed, scalability, and multimodal capabilities of the Grok 4 Fast models today. 

The Grok 4 Fast models offer developers the speed, scalability, and multimodal capabilities needed to advance intelligent applications, supporting complex workflows and innovative solutions across a range of use cases.  

Pricing for Grok 4 Fast Models on Azure AI Foundry 

Get started in minutes 

With the Grok 4 Fast models, developers gain access to cutting-edge AI with a massive context window, efficient GPU performance, and enterprise-grade governance. Start building the future of AI today,visit the Model Catalog in Azure AI Foundry and deploy grok-4-fast-reasoning and grok-4-fast-non-reasoning to accelerate your innovation.