Grok 4.1 Fast

xAI

Low-latency Grok for high-throughput real-time workloads.

1M+ contextUltra-low costStrong reasoningMultimodal vision
TextVisionTool useReasoningCode
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Performance

Artificial Analysis — Intelligence Index· 2026-06-17
Intelligence Index43Above average · 4.3/10

Specifications

VendorxAI
FamilyGrok
Context1M · 750k words（≈ a novella）
Max output64K · 48k words（≈ a thesis）Below average
Released2026-02-25
Open sourceNo
Tool use✓
Benchmark details (developers: Arena Elo / academic benchmarks)
Arena Elo1370Above average

Pricing across channels

per 1M tokens, USD

ChannelTypeInputOutput→
xAI APIOfficial$0.20$0.50visit
OpenRouterAggregator$0.20$0.50visitAd
xAI Pricing· 2026-06-17

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