GPT 5.5

Release Date: 4/23/2026

Vals Index

Accuracy (Vals Index)

67.95% ± 1.54

Latency (Vals Index)

681.75s

Cost/Test (Vals Index)

$4.60

Context Window

1M

Max Output Tokens

128k

Input Modality

Hyperparameter settings
Default Provider : OpenAI

Temperature

Default

Top P

Default

Top K

Default

Max Output Tokens

128,000

Reasoning Effort

xhigh

Benchmarks

Accuracy

Rankings

0.0%

± 1.54
7/ 36

0.0%

± 1.42
6/ 27

0.0%

± 4.16
4/ 29

0.0%

± 0.92
4/ 122

0.0%

± 5.16
3/ 15

0.0%

± 2.87
6/ 22

0.0%

± 0.55
9/ 36

0.0%

± 3.41
5/ 21

0.0%

± 2.19
15/ 72

0.0%

± 1.93
6/ 71

0.0%

± 0.91
8/ 86

0.0%

± 5.00
9/ 48

0.0%

± 3.95
9/ 67

0.0%

± 1.27
11/ 17

0.0%

± 0.85
17/ 128

0.0%

± 4.54
9/ 72

0.0%

± 1.17
10/ 22

0.0%

± 1.29
4/ 122

0.0%

± 1.02
23/ 127

0.0%

± 0.41
6/ 125

0.0%

± 0.32
13/ 121

0.0%

± 0.77
4/ 82

0.0%

± 0.50
4/ 30

0.0%

± 4.52
2/ 12

0.0%

± 1.70
8/ 70

0.0%

± 0.65
4/ 41
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