Context Window
2,000,000
Tokens
Model Cost Profile
xAI: Grok 4.1 Fast
Developer: x-ai
Pricing updated Mar 11, 2026
Input rank: #142Output rank: #125
Live Pricing
Input: $0.2000
Output: $0.5000
Pricing via OpenRouter API · Last synced Mar 11, 2026 · MMLU score via public benchmark data
xAI: Grok 4.1 Fast is designed for applications requiring extensive context handling, with a remarkable context window of 2,000,000 tokens, making it suitable for complex document analysis and large-scale data processing. Teams leveraging this API model can expect an input cost of $0.20 per million tokens and an output cost of $0.50 per million tokens, allowing for budget planning based on token usage. This model is particularly beneficial for businesses in sectors such as legal, research, and content creation, where comprehensive context and detailed output are essential for informed decision-making.
👁 Vision🔧 Tool Calling📋 Structured Output🧠 Reasoning
Input Price / 1M
$0.2000
Prompt tokens
Output Price / 1M
$0.5000
Completion tokens
Intelligence (MMLU)
74.3
Massive Multitask Language Understanding
Benchmark Scores
Standardized evaluation scores for xAI: Grok 4.1 Fast.
Side-by-Side Pricing Table
| Usage Type | Price / 1M Tokens |
|---|---|
| Input (Prompt) | $0.2000 |
| Output (Completion) | $0.5000 |
Price History
xAI: Grok 4.1 Fast Pricing Trend
Input / 1M tokens0.0%Output / 1M tokens0.0%
Mar 7 — Mar 11
Current Input / 1M
$0.2000
Current Output / 1M
$0.5000
Cost Calculator
Estimate monthly spend for xAI: Grok 4.1 Fast based on your workload.
01.0B
0500M
Estimated Monthly Cost
$11
25M input + 12M output tokens
Cheaper Alternatives to Compare
Quick links for cost-down decisions before production rollout.
FAQ
Common pricing and benchmark questions for xAI: Grok 4.1 Fast.
How much does xAI: Grok 4.1 Fast cost per 1M input tokens?
xAI: Grok 4.1 Fast input pricing is $0.2000 per 1M tokens based on the latest synced provider data.
How much does xAI: Grok 4.1 Fast cost per 1M output tokens?
xAI: Grok 4.1 Fast output pricing is $0.5000 per 1M tokens based on the latest synced provider data.
What context window does xAI: Grok 4.1 Fast support?
xAI: Grok 4.1 Fast supports a context window of 2,000,000 tokens.
How can I compare xAI: Grok 4.1 Fast with cheaper alternatives?
Use the comparison links on this page to open direct model-vs-model pricing and benchmark pages, then evaluate monthly spend projections for your workload.