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Claude Opus 5.5 (medium) vs GPT-5.5 (low)

GPT-5.5 (low) leads on average score with 9.5 vs 9.2. Claude Opus 5.5 (medium) has the lower benchmark cost at $1.804 vs $1.822. GPT-5.5 (low) is faster at 11.91s vs 25.85s, with pass rates of 89.9% vs 87.0%.

Last updated at: 2026-10-07

Compared models

Rank
#29
Total Output Tokens
32,127
Response Time (avg)
25.85s
Total Cost
$1.804
Rank
#22
Total Output Tokens
31,065
Response Time (avg)
11.91s
Total Cost
$1.822
Recommended model GPT-5.5 (low)

It has the best score here (9.5), while responding about 2.2x faster than Claude Opus 5.5 (medium).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 medium Release: 2026-09-23 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 9.2 9.5
Rank #29 #22
Reliability 10.0 10.0
Consistency 9.7 10.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 89.9% 87.0%
Flaky tests 1 0
Total Runs 69 69
Cost per result 9.016 9.109
Total Cost $1.804 $1.822
Input Price $4.000 / 1M $5.000 / 1M
Output Price $20.000 / 1M $30.000 / 1M
Cache Read Price $0.200 / 1M $0.500 / 1M
Cache Write Price $5.000 / 1M N/A
Total Input Tokens 290,117 177,939
Output Tokens 9,805 6,283
Reasoning Tokens 22,322 24,782
Response Time (avg) 25.85s 11.91s
Response Time (max) 90.20s 56.19s
Response Time (total) 594.63s 273.82s
Parameters ~5T total (~500B active) ~1.5T total (~100B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#29 Claude Opus 5.5

medium
Cost
$0.053
Time
25.6s
Tokens
2,781 tok

#22 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 5.5 8.4 7.4 88.9% 1 13.50s 10,608 636 4,341
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402

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