Grok 4 Fast (Reasoning)

Release Date: 9/19/2025

Accuracy (Average)

54.47%

Latency (Average)

241.05s

Avg. Cost (In/Out)

0.2 / 0.5

Context Window

2M

Max Output Tokens

2M

Input Modality

Hyperparameter settings
Default Provider : xAI

Temperature

0.7

Top P

0.95

Top K

Default

Max Output Tokens

2,000,000

Benchmarks

Accuracy

Rankings

0.0%

± 0.93
6/ 105

0.0%

± 1.94
35/ 57

0.0%

± 2.14
16/ 57

0.0%

± 0.95
67/ 74

0.0%

± 3.04
48/ 55

0.0%

± 0.76
6/ 111

0.0%

± 0.00
43/ 44

0.0%

± 1.79
23/ 105

0.0%

± 4.39
25/ 53

0.0%

± 1.10
46/ 110

0.0%

± 0.45
50/ 108

0.0%

± 0.39
63/ 104

0.0%

± 1.07
40/ 71

0.0%

± 2.23
44/ 48

0.0%

± 4.85
42/ 62
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