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Claude Opus 5 vs OpenAI: GPT-5.5

GPT-5.5 (low) leads on average score with 9.3 vs 9.2. GPT-5.5 (low) has the lower benchmark cost at $1.253 vs $2.835. GPT-5.5 (low) is faster at 10.13s vs 20.44s, with pass rates of 84.9% vs 86.4%.

Recommended modelGPT-5.5 (low)It has the best score here (9.3), while costing about 2.3x less than Claude Opus 5 (high).

Last updated at: 2026-07-25

Metric Claude Opus 5 Claude Opus 5 high Release: 2026-07-25 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 9.2 9.3
Rank #11 #9
Reliability 10.0 10.0
Consistency 9.6 10.0
Tests Correct
Attempt pass rate 84.9% 86.4%
Flaky tests 1 0
Total Runs 66 66
Cost per result 15.747 6.594
Total Cost $2.835 $1.253
Input Price $5.000 / 1M $5.000 / 1M
Output Price $25.000 / 1M $30.000 / 1M
Total Input Tokens 135,959 80,058
Output Tokens 67,066 5,378
Reasoning Tokens 19,114 23,040
Response Time (avg) 20.44s 10.13s
Response Time (max) 159.01s 56.19s
Response Time (total) 449.68s 222.82s

Hamster playing table tennis

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

#11 Claude Opus 5

high
Cost
$0.265
Time
144.5s
Tokens
10,741 tok

#9 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 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 10.0 10.0 100.0% 0 12.73s 10,590 7,547 1,721
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402

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