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Claude Opus 5 vs OpenAI: GPT-5.5

GPT-5.5 (medium) leads on average score with 9.0 vs 8.6. Claude Opus 5 (low) has the lower benchmark cost at $1.121 vs $4.137. Claude Opus 5 (low) is faster at 6.99s vs 38.42s, with pass rates of 80.3% vs 87.9%.

Recommended modelClaude Opus 5 (low)Its score stays close to the best score here (8.6 vs 9.0), while costing about 3.7x less than GPT-5.5 (medium).

Last updated at: 2026-07-25

Metric Claude Opus 5 Claude Opus 5 low Release: 2026-07-25 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 8.6 9.0
Rank #23 #15
Reliability 10.0 10.0
Consistency 9.3 8.9
Tests Correct
Attempt pass rate 80.3% 87.9%
Flaky tests 2 3
Total Runs 66 66
Cost per result 6.593 22.980
Total Cost $1.121 $4.137
Input Price $5.000 / 1M $5.000 / 1M
Output Price $25.000 / 1M $30.000 / 1M
Total Input Tokens 134,773 80,659
Output Tokens 14,123 5,617
Reasoning Tokens 3,896 118,819
Response Time (avg) 6.99s 38.42s
Response Time (max) 30.67s 332.10s
Response Time (total) 153.73s 845.35s

Hamster playing table tennis

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

#23 Claude Opus 5

low
Cost
$0.062
Time
30.2s
Tokens
2,615 tok

#15 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 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 Opus 5 7.8 7.4 77.8% 1 6.70s 10,590 2,442 760
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959

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