readable AI benchmarks (simplified)

readable AI benchmarks

Anthropic

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

reasoning · closed weights · Sep 1, 2026

Claude Fable 5.1 (Adaptive Reasoning, Medium Effort, Default Fallback) has a Quality Score of 77.2, ranking 6th 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 68.8, ranking 5th among 272 scored models, above average (total average: 34.1). Its Value Score is 43.9, high compared with the total Value average of 28.2.

Quality Score77.2coverage 91.2%: missing Epoch General ECI, CursorBench 3.2 and DeepSWE v1.1
Value Score43.9
Reliability68.8
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
$1.00

Capability

Intelligence
60.5
Coding
77.1
Agentic
52.7
Omniscience
37.6
Correct
63.1%
Blended price
$7.18

Answer outcomes

Attempt rate: 88.6%

Correct 63.1%Incorrect 25.5%Abstained 11.4%

Artificial Analysis benchmarks

GDPval-AA v2
58%
τ³-Banking
41%
Terminal-Bench v2.1
88%
SciCode
55%
Humanity’s Last Exam
54%
GPQA Diamond
89%
CritPt
29%
AA-Omniscience
69%
AA-LCR
79%

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