TAU2
Measured May 29, 2026Source
Score
0.93
Models13 0 
Grok 4.1 Fast (Reasoning)
xAIxAIUnited States
xAI is an AI research company that develops advanced large language models, including the Grok series, with features like 2 million token context windows, optimized for agentic workflows and tool-calling, focusing on reduced hallucinations and improved reasoning.
Input / 1M tokens
$0.00Output / 1M tokens
$0.00Output tokens/s
99.1First-token seconds
9.03sSupported plans
0Benchmark history
Evaluations
Terminalbench Hard
Measured May 29, 2026Source
Score
0.24
Lcr
Measured May 29, 2026Source
Score
0.68
Ifbench
Measured May 29, 2026Source
Score
0.53
Aime 25
Measured May 29, 2026Source
Score
0.89
Scicode
Measured May 29, 2026Source
Score
0.44
Livecodebench
Measured May 29, 2026Source
Score
0.82
Hle
Measured May 29, 2026Source
Score
0.18
Gpqa
Measured May 29, 2026Source
Score
0.85
Mmlu Pro
Measured May 29, 2026Source
Score
0.85
Artificial Analysis Math Index
Measured May 29, 2026Source
Score
89.3
Artificial Analysis Coding Index
Measured May 29, 2026Source
Score
30.9
Artificial Analysis Intelligence Index
Measured May 29, 2026Source
Score
38.6
Plan availability
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