Model Detail
Grok 4.1 Fast Reasoning
xAI · Text · チャット補完
Lightweight model for cost-sensitive chat, basic generation, and batch text tasks.
Updated 2026-03-23
Input
0.2 USD / 1M tokens
Output
0.5 USD / 1M tokens
Context window
2,000,000 tokens
Max output
Not provided
Capabilities
Knowledge cutoff
Not provided
Reasoning model
Yes
Primary unit
1M トークン
Official and future third-party prices are shown in a shared unit.
Evidence rows
1
Each price row keeps source site, observed time, and excerpt.
Quick verify
Verify on Artificial Analysis
Start from this summary, then cross-check official sources or leaderboards.
Use cases
Good for
Not ideal for
Artificial Analysis snapshot
Fields below come from the AA model page for quick cross-checking.
AA Intelligence
38.61
AA Input price
0.2 USD / 1M tokens
AA Output price
0.5 USD / 1M tokens
Input modalities
Image / Text
Output modalities
Text
Source domain
artificialanalysis.aiPricing details
Structured official and third-party prices with extensible dimensions.
Official pricing
Third-party provider pricing
Sources and evidence
Each price line includes a source chain for trust and verification.
Field入力 / 出力
Scenarioチャット補完
Captured value0.2 USD / 1M tokens
Source domainx.ai
Observed at2026-03-23
ExcerptxAI API page (2026-03-23 review): grok-4-1-fast-reasoning text input is listed at USD $0.20 per 1M tokens. --- xAI API page (2026-03-23 review): grok-4-1-fast-reasoning output is listed at USD $0.50 per 1M tokens.