GPT 5.5

Release Date: 4/23/2026

Vals Index

Accuracy (Vals Index)

67.62% ± 1.59

Latency (Vals Index)

1055.91s

Cost/Test (Vals Index)

$4.81

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%

± 1.59
1/ 19

0.0%

± 1.47
1/ 14

0.0%

± 0.92
2/ 107

0.0%

± 0.55
2/ 19

0.0%

± 2.19
13/ 58

0.0%

± 1.93
2/ 58

0.0%

± 0.91
5/ 75

0.0%

± 5.00
3/ 32

0.0%

± 3.95
6/ 55

0.0%

± 0.85
10/ 112

0.0%

± 4.54
2/ 45

0.0%

± 1.29
2/ 106

0.0%

± 1.02
16/ 111

0.0%

± 0.41
4/ 109

0.0%

± 0.32
7/ 104

0.0%

± 0.77
2/ 71

0.0%

± 1.70
1/ 48

0.0%

± 3.98
1/ 64
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