Input Price
$0.2
per 1M tokens
Output Price
$0.5
per 1M tokens
Context Window
2,000K
tokens (131.072K max output)
Specifications
Release Date2026-01-15
Category⚡ Efficient
Context Window2,000,000 tokens
Max Output131,072 tokens
Capabilities
textreasoningcode
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Monthly Cost Estimates
| Usage Level | Daily Tokens | Daily | Monthly | Yearly |
|---|---|---|---|---|
| Light~50 requests/day | 100K in / 20K out | $0.03 | $0.90 | $11 |
| Medium~200 requests/day | 500K in / 100K out | $0.15 | $4.50 | $55 |
| Heavy~1K requests/day | 2,000K in / 500K out | $0.65 | $19.50 | $237 |
| Enterprise~5K requests/day | 10,000K in / 2,000K out | $3.00 | $90.00 | $1095 |
Cost Calculator
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Frequently Asked Questions
How much does Grok 4.1 Fast API cost per million tokens?▼
Grok 4.1 Fast costs $0.2 per million input tokens and $0.5 per million output tokens as of 2026. These are the standard API rates from xAI.
What is the Grok 4.1 Fast context window?▼
Grok 4.1 Fast supports a 2M context window (2,000,000 tokens), which means you can process up to 2M tokens in a single API call.
How much does Grok 4.1 Fast cost per month?▼
At medium usage (~200 requests/day with 500K input and 100K output tokens/day), Grok 4.1 Fast costs approximately $4.50/month. Light usage runs about $0.90/month, and heavy usage (~1K requests/day) around $19.50/month.
Is there a cheaper alternative to Grok 4.1 Fast?▼
Yes — Gemini 2.5 Flash-Lite by Google is a cheaper option at $0.1/M input tokens vs $0.2/M for Grok 4.1 Fast. Other budget alternatives include models in the efficient tier.
Is Grok 4.1 Fast good for ai agent / agentic workflows?▼
Grok 4.1 Fast is a efficient model with support for text, reasoning, code. For ai agent / agentic workflows, it offers 2M context and costs $0.2/M input tokens — a budget-friendly choice for this use case.
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