Grok 4.1 Fast Reasoning Token Counter & Cost Calculator
Official pricing source: verified • Verified on 2026-02-22
Pricing Breakdown
Official pricing source: verified (last checked 2026-02-22)
| Tier | Input (USD / 1M) | Output (USD / 1M) |
|---|---|---|
| All usage | 0.20 | 0.50 |
Example Costs
These are quick estimates using verified pricing bands (when available). Output tokens are the main driver here; use the calculator above for real prompt-based totals.
Frequently Asked Questions
Grok 4.1 Fast Reasoning pricing starts around 0.2 per 1M input tokens. See the official pricing source above for the latest updates.
Grok 4.1 Fast Reasoning is typically used for reasoning tasks, document analysis, structured output, and production API workloads.
Use the "Official pricing source" link at the top of this page for the provider's most up-to-date pricing.
When to Use Grok 4.1 Fast Reasoning
Context Window
Grok 4.1 Fast Reasoning supports a maximum context size of 2,000,000 tokens.
This includes both input and output tokens combined. If your total tokens exceed this limit, the API may truncate input or return an error.
How to Reduce API Costs
Words to Tokens Conversion
1,000 tokens ≈ 750–800 English words
Use the token counter above for exact model-specific calculation. Different languages and formats may vary.
Related Resources
Performance & Latency
Grok 4.1 Fast Reasoning is optimized for high-quality output. For lower latency workloads, consider smaller or "flash" variants where available.