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uxwizz.com
#18

Claude Fable 5.1

Anthropic Release: 2026-09-02 Tested on: 2026-09-02 02:04 anthropic/claude-fable-5.1::high
~9.5T total (~878B active)MoEClosedEstimated
(high) (medium) (low)

Summary

Claude Fable 5.1 scores 9.0 on AI BENCHY and ranks #18. It has 10.0 reliability, a 89.4% pass rate, $3.364 total cost, and 13.59s average response time.

Model facts

Researched on 2026-09-02

Estimated
Parameters
~9.5T total (~878B active)
Architecture
MoE
Availability
Closed
License
-

Best estimate from public evidence; the vendor did not disclose every value. Anthropic does not disclose parameter counts or architecture; estimates follow the Claude Fable 5 family record.

Parameter source Availability source

Score

9.0

Consistency

9.6

Reliability

10.0

Total Cost (Current Price)

$3.364

Total Output Tokens

40,071

Total Input Tokens

135,958

Input Price

$10.000 / 1M

Output Price

$50.000 / 1M

Tests Correct

Wrong Tests: 3

Attempt pass rate: 89.4%

Flaky tests

1

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

13.59s

Response Time (max): 40.17s

Response Time (total): 298.90s

Wrong answer: 3

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#18 Claude Fable 5.1

high
Cost
$0.384
Time
102.5s
Tokens
7,824 tok

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

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Category Breakdown

Category Score Consistency Tests Correct
Anti-AI Tricks 10.0 10.0
Coding 8.4 7.4
Combined 10.0 10.0
Data parsing and extraction 10.0 10.0
Domain specific 7.7 10.0
General Intelligence 10.0 10.0
Instructions following 10.0 10.0
Puzzle Solving 10.0 10.0
Tool Calling 10.0 10.0
Trivia 3.0 10.0

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