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

Claude Opus 5 (high) leads on average score with 9.2 vs 9.0. Claude Opus 5 (high) has the lower benchmark cost at $3.070 vs $3.364. Claude Fable 5.1 (high) is faster at 13.59s vs 22.51s, with pass rates of 89.4% vs 81.8%.

Last updated at: 2026-09-02

Rank
#18
Total Output Tokens
40,071
Response Time (avg)
13.59s
Total Cost
$3.364
Rank
#14
Total Output Tokens
95,583
Response Time (avg)
22.51s
Total Cost
$3.070
Recommended model Claude Fable 5.1 (high)

Its score stays close to the best score here (9.0 vs 9.2), while responding about 1.7x faster than Claude Opus 5 (high).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 high Release: 2026-09-02 Claude Opus 5 Claude Opus 5 high Release: 2026-07-25
Score 9.0 9.2
Rank #18 #14
Reliability 10.0 10.0
Consistency 9.6 10.0
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 89.4% 81.8%
Flaky tests 1 0
Total Runs 66 66
Cost per result 17.701 17.052
Total Cost $3.364 $3.070
Input Price $10.000 / 1M $5.000 / 1M
Output Price $50.000 / 1M $25.000 / 1M
Total Input Tokens 135,958 135,956
Output Tokens 7,930 64,624
Reasoning Tokens 32,141 30,959
Response Time (avg) 13.59s 22.51s
Response Time (max) 40.17s 159.01s
Response Time (total) 298.90s 495.12s
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

#14 Claude Opus 5

high
Cost
$0.265
Time
144.5s
Tokens
10,741 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 12.73s 10,590 7,547 1,721

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