Claude Fable 5

Release Date: 6/9/2026

Vals Index

Accuracy (Vals Index)

75.14% ± 0.64

Latency (Vals Index)

1050.68s

Cost/Test (Vals Index)

$5.16

Context Window

1M

Max Output Tokens

128k

Input Modality

Hyperparameter settings
Default Provider : Anthropic

Temperature

1

Top P

Default

Top K

Default

Max Output Tokens

128,000

Compute Effort

max

Show scores with fallbacks counted as failures

Benchmarks

Accuracy

Rankings

0.0%

± 0.64
1/ 36

0.0%

± 0.57
1/ 27

0.0%

± 4.61
1/ 29

0.0%

± 0.88
1/ 122

0.0%

± 0.84
3/ 36

0.0%

± 2.20
2/ 72

0.0%

± 1.95
2/ 71

0.0%

± 0.91
6/ 86

0.0%

± 4.23
2/ 48

0.0%

± 3.40
6/ 67

0.0%

± 0.82
4/ 128

0.0%

± 2.10
1/ 72

0.0%

± 2.17
3/ 22

0.0%

± 1.94
3/ 122

0.0%

± 9.36
3/ 58

0.0%

± 0.89
1/ 127

0.0%

± 0.33
1/ 125

0.0%

± 0.28
1/ 121

0.0%

± 0.74
1/ 82

0.0%

± 0.99
1/ 30

0.0%

± 0.98
2/ 70

0.0%

± 1.35
2/ 41
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.