Grok 4.1 Fast by xAI — 2.0M Context
A frontier multimodal model optimized specifically for high-performance agentic tool calling.
At a glance
Modalities
Context window
2,000,000
Pricing
input / output per 1M
Reasoning
Capabilities
Streaming
Real-time token-by-token response streaming
Function calling
Connect the model to external tools and systems
Structured outputs
Return responses in JSON schema format
Reasoning
The model thinks before responding
Caching
Cache responses to reduce latency and costs
Web search
Search the internet for real-time information
Live search
Real-time web search with source citations
Details
| Model ID | grok-4.1-fast |
| Provider | xAI |
Rate limits
| Tier | RPM | TPM | Batch queue |
|---|---|---|---|
| Default | 480 | 4,000,000 | — |
What You Need to Know About Grok 4.1 Fast
Complete Overview of Grok 4.1 Fast by xAI
Get detailed information about Grok 4.1 Fast, including its context window of 2000000 tokens, pricing per million tokens, supported input and output modalities, and benchmark scores. This model from xAI offers specific capabilities for natural language processing, code generation, and complex reasoning tasks that set it apart from alternatives.
Pricing and Cost Analysis for Grok 4.1 Fast
Compare input and output token pricing for Grok 4.1 Fast against other models in its class. Understanding LLM pricing is essential for budgeting your AI applications at scale. We break down the cost per million tokens for both input and output so you can estimate the total cost of your workloads and compare value across providers.
Benchmarks and Performance Metrics for Grok 4.1 Fast
Review benchmark performance data for Grok 4.1 Fast across key evaluation metrics. Compare its reasoning, coding, and language understanding capabilities against competing models to determine if it is the right fit for your specific requirements, whether that involves complex analysis, creative generation, or efficient inference at scale.