Grok 4.1 Fast
deprecated
xAI2025-11-19
Specifications
Modalities
text
Context Window2000K tokens
Max Output-
Training Cutoff-
Open SourceNo
Pricing (per 1M tokens)
Input$0.2000
Output$0.5000
Benchmarks
Arena score (text)1430
Arena ratings: LMArena leaderboard dataset, CC BY 4.0, snapshot 2026-10-28.
MMLU-Pro-
SWE-Bench-
GPQA Diamond-
HumanEval-
ARC-AGI-
MATH-
API
Model ID
grok-4.1-fastSources
- LMArena: Arena leaderboard dataset, text_style_control overall: Grok 4.1 Fast (Reasoning)
elo rating · as of 2026-10-28
- xAI: Grok 4.1 Fast and Agent Tools API
price input, price output · as of 2026-11-03
- xAI: Migration Guides: May 15 retirement
status · as of 2026-11-03