Grok 4 Fast (Reasoning)

Release Date: 9/19/2025

Accuracy (Average)

53.94%

Latency (Average)

229.66s

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
9/ 117

0.0%

± 1.94
41/ 68

0.0%

± 2.14
21/ 66

0.0%

± 0.95
74/ 81

0.0%

± 3.04
54/ 62

0.0%

± 0.76
7/ 123

0.0%

± 0.00
66/ 67

0.0%

± 1.79
30/ 117

0.0%

± 4.39
27/ 55

0.0%

± 1.10
56/ 123

0.0%

± 0.45
57/ 120

0.0%

± 0.39
72/ 116

0.0%

± 1.07
45/ 77

0.0%

± 2.23
61/ 65
Contact us
Or send us an email at contact@vals.ai

License type:

Proprietary (contact us to get access)
Industry Partner
Academic

Read our methodology.