Grok 4.1 Fast Reasoning API price
Cheapest at Cheaper Inference; 6 sellers compared below.
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1,500 input and 400 output tokens per request, 30% of input cached.
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[](https://easiapiai.com/m/xai--grok-4-1-fast-reasoning.html)HTML<a href="https://easiapiai.com/m/xai--grok-4-1-fast-reasoning.html"><img src="https://easiapiai.com/badge/xai--grok-4-1-fast-reasoning.svg" alt="Grok 4.1 Fast Reasoning API: from $0.17 in / $0.43 out per 1M · Cheaper Inference · 20 Oct 2026" height="40"></a>- Context window
- 1M1,000,000 tokens
- Cached input
- from $0.043per 1M tokens
- Last checked
- 20 Oct, 17:14 UTC
Price history
Cheapest standard price per 1M tokens, recorded every 6 hours since 16 Oct 2026.
No price change has held for 12 hours since 16 Oct 2026.
More from xAI: Grok 4.7 $1.60 · Grok 4.20 $1.25 · Grok 4.3 $1.25