grok-4-1-fast-non-reasoning
Grok 4.1 Fast Non‑Reasoning is designed for low‑latency, near‑instant responses, emphasizing speed, high‑quality outputs, and smooth tool‑calling in agentic workflows, making it well‑suited for high‑throughput, real‑time scenarios where immediate responsesxAI
xAIDirect from Azure
Version: 1
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About this model
Grok 4.1 Fast Non-Reasoning is the instant-response variant of xAI's frontier tool-calling model. It skips the thinking tokens phase for maximum speed and low latency while delivering high-quality outputs optimized for agentic workflows. Built on the Grok 4.1 lineage, it maintains strong tool-calling accuracy, reduced hallucinations compared to prior generations, and supports a large context window. This variant excels in high-throughput, real-time scenarios where immediate responses are prioritized over step-by-step reasoning.Responsible AI considerations
Safety techniques
Because models developed by xAI push the frontier of AI capabilities, xAI seeks to mitigate their risks through both evaluating model behaviors and implementing safeguards. Details about the evaluation and mitigation for top RAI risks are included in the xAI Grok 4.1 Fast Non-Reasoning model card.Safety evaluations
Microsoft's safety and responsible AI evaluations found Grok-4.1 Fast Non-Reasoning to be less safe than other models evaluated and offered through Azure Direct. In particular, the review found that the model brings (i) higher risks of producing potentially harmful content (e.g., content including hate and unfairness, sexual, violent, and glorification of self-harm) and (ii) higher risks of successful jailbreak attacks. Grok-4.1 Fast Non-Reasoning benchmarks and system evaluations are detailed in the xAI Grok 4.1 Fast Non-Reasoning model card. We have also made safety benchmarks available for this model in the model card benchmark tab and the tradeoff chart, which illustrates the significantly higher jailbreak success rates on Grok-4.1 Fast Non-Reasoning compared to other models.Known limitations and considerations
We require that customers use both system safety messages and Azure AI Content Safety (AACS) service to manage model behavior and comply with the Microsoft Enterprise AI Services Code of Conduct, but note that integration of these required safeguards will probably not mitigate all the risks. Given Microsoft's safety and responsible AI evaluation found Grok-4.1 Fast Non-Reasoning to be less safe than other models offered through Azure Direct (see "Safety evaluations" section above), there may be categories of harm this model can produce that are not covered by Azure AI Content Safety evaluation and mitigations. Therefore, customers should conduct their own evaluations according to their intended use cases and implement appropriate mitigations before deploying Grok-4.1 Fast Non-Reasoning in production systems.Acceptable use policy
Review the xAI model card for additional information on system evaluations, expected behavior, and safety systems. Customers are required to use both system safety messages and Azure AI Content Safety (AACS) service to manage model behavior and comply with the Microsoft Enterprise AI Services Code of Conduct. See the "Out of scope use cases" section for scenarios where we do not recommend deploying Grok-4.1 Fast Non-Reasoning.Key model capabilities
It supports general-purpose tasks like quick query responses, factual answering, creative writing, tool use (e.g., code execution, web search), and agentic interactions. As a non-reasoning model, it provides pattern-matched, efficient answers without internal chain-of-thought processing, making it ideal for latency-sensitive applications such as real-time chat, lightweight automation, customer support backends, and high-volume API calls. It retains frontier-level tool-calling performance and multimodal support (text + images).Quick facts
Model providerxAI
TypeChat completion
LifecycleGenerally available (GA)
Input typetext, image
Output typetext
Context window128k
Token limits128k output
PricingView pricing