Grok 4.1 Fast
Grok 4.1 Fast is the previous-generation Grok flagship, kept around as an enterprise-tier fast option for high-throughput workloads.
xAI · Grok
Grok 4.1 Fast
Fast Grok for high-throughput enterprise workloads
Grok 4.1 Fast is the previous-generation Grok flagship, kept around as an enterprise-tier fast option for high-throughput workloads.
Key features
Grok 4.1 Fast · AI Models
Context window
256K tokens
Released
November 2025
Pricing
xAI Enterprise API
Key features
- Optimised for enterprise high-throughput API usage.
- Real-time X grounding.
- Lower cost than Grok 4.20 / 4.3.
- Stable, production-tested model.
Best for
Use Grok 4.1 Fast for predictable high-volume Grok workloads where you don't need the absolute latest reasoning quality.
Frequently Asked Questions
Is Grok 4.1 Fast still maintained?
Yes — xAI keeps Grok 4.1 Fast as a stable, production-tested enterprise tier. It receives security and reliability updates even as newer Grok 4.x models are developed.
Does Grok 4.1 Fast have access to real-time X data?
Yes — like all Grok models, Grok 4.1 Fast integrates with X for real-time grounding, giving it access to live public discourse even in this earlier iteration.
Open Chat
Grok 4.1 Fast is the previous-generation Grok flagship, kept around as an enterprise-tier fast option for high-throughput workloads.