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Anthropic: Claude Fable 5 vs Claude Opus 5

The average score is effectively tied at 8.6 vs 8.6. Claude Opus 5 (low) has the lower benchmark cost at $1.121 vs $3.478. Claude Opus 5 (low) is faster at 6.99s vs 17.20s, with pass rates of 78.8% vs 80.3%.

Recommended modelClaude Opus 5 (low)It has the best score here (8.6), while costing about 3.1x less than Claude Fable 5 (medium).

Last updated at: 2026-07-25

Metric Claude Fable 5 Claude Fable 5 medium Release: 2026-06-10 Claude Opus 5 Claude Opus 5 low Release: 2026-07-25
Score 8.6 8.6
Rank #22 #23
Reliability 10.0 10.0
Consistency 9.6 9.3
Tests Correct
Attempt pass rate 78.8% 80.3%
Flaky tests 1 2
Total Runs 66 66
Cost per result 20.459 6.593
Total Cost $3.478 $1.121
Input Price $10.000 / 1M $5.000 / 1M
Output Price $50.000 / 1M $25.000 / 1M
Total Input Tokens 89,643 134,773
Output Tokens 41,360 14,123
Reasoning Tokens 10,269 3,896
Response Time (avg) 17.20s 6.99s
Response Time (max) 80.80s 30.67s
Response Time (total) 378.41s 153.73s

Hamster playing table tennis

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

#22 Claude Fable 5

medium
Cost
$0.606
Time
156.7s
Tokens
12,264 tok

#23 Claude Opus 5

low
Cost
$0.062
Time
30.2s
Tokens
2,615 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 10.0 10.0 100.0% 0 15.59s 10,590 7,383 1,318
Claude Opus 5 7.8 7.4 77.8% 1 6.70s 10,590 2,442 760

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