readable AI benchmarks (simplified)

readable AI benchmarks

Anthropic

Claude Fable 5.1 (Adaptive Reasoning, High Effort, Default Fallback)

reasoning · closed weights · Sep 1, 2026

Claude Fable 5.1 (Adaptive Reasoning, High Effort, Default Fallback) has a Quality Score of 79.6, ranking 4th among 272 scored models. Per 1M tokens, pricing is $10.00 input, $50.00 output, $0.250 cached input, and $12.50 cached output. It accepts text and image input, outputs text, and has a 1M token context window. Its Reliability Score is 70.4, ranking 4th among 272 scored models, above average (total average: 34.1). Its Value Score is 45.4, high compared with the total Value average of 28.2.

Quality Score79.6coverage 91.2%: missing Epoch General ECI, CursorBench 3.2 and DeepSWE v1.1
Value Score45.4
Reliability70.4
Cache Discount98%

Model specification

Reasoning
reasoning
Input modalities
text, image
Output modalities
text
Context window
1M tokens
Weights
closed weights

Token prices USD per 1M tokens

Input
$10.00
Output
$50.00
Cached Input
$0.250
Cached Output
$12.50
Cost per task
$1.43

Capability

Intelligence
62.5
Coding
79.1
Agentic
55.8
Omniscience
40.8
Correct
64.9%
Blended price
$7.18

Answer outcomes

Attempt rate: 89.1%

Correct 64.9%Incorrect 24.1%Abstained 10.9%

Artificial Analysis benchmarks

GDPval-AA v2
62%
τ³-Banking
43%
Terminal-Bench v2.1
90%
SciCode
58%
Humanity’s Last Exam
56%
GPQA Diamond
91%
CritPt
30%
AA-Omniscience
70%
AA-LCR
77%

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