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Claude Fable 5.1 (high) vs Claude Opus 5 (medium)

Claude Opus 5 (medium) leads on average score with 9.2 vs 9.0. Claude Opus 5 (medium) has the lower benchmark cost at $1.586 vs $3.364. Claude Opus 5 (medium) is faster at 10.26s vs 13.59s, with pass rates of 89.4% vs 83.3%.

Last updated at: 2026-09-02

Rank
#18
Total Output Tokens
40,071
Response Time (avg)
13.59s
Total Cost
$3.364
Rank
#15
Total Output Tokens
36,618
Response Time (avg)
10.26s
Total Cost
$1.586
Recommended model Claude Opus 5 (medium)

It has the best score here (9.2), while costing about 2.1x less than Claude Fable 5.1 (high).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 high Release: 2026-09-02 Claude Opus 5 Claude Opus 5 medium Release: 2026-07-25
Score 9.0 9.2
Rank #18 #15
Reliability 10.0 10.0
Consistency 9.6 9.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 89.4% 83.3%
Flaky tests 1 1
Total Runs 66 66
Cost per result 17.701 8.811
Total Cost $3.364 $1.586
Input Price $10.000 / 1M $5.000 / 1M
Output Price $50.000 / 1M $25.000 / 1M
Total Input Tokens 135,958 135,604
Output Tokens 7,930 23,814
Reasoning Tokens 32,141 12,804
Response Time (avg) 13.59s 10.26s
Response Time (max) 40.17s 35.43s
Response Time (total) 298.90s 225.66s
Parameters ~9.5T total (~878B active) ~5T total (~500B active)
Availability Closed Closed

Model generation showcase

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

#15 Claude Opus 5

medium
Cost
$0.125
Time
69.3s
Tokens
5,134 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Fable 5.1 8.4 7.4 88.9% 1 13.91s 10,608 520 6,503
Claude Opus 5 10.0 10.0 100.0% 0 9.56s 10,590 5,224 1,162

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