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

The average score is effectively tied at 9.4 vs 9.5. Claude Opus 5.5 (low) has the lower benchmark cost at $1.733 vs $1.822. GPT-5.5 (low) is faster at 11.91s vs 25.68s, with pass rates of 88.4% vs 87.0%.

Last updated at: 2026-10-26

Compared models

Rank
#26
Total Output Tokens
25,006
Response Time (avg)
25.68s
Total Cost
$1.733
Rank
#25
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 (low).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 low Release: 2026-09-23 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 9.4 9.5
Rank #26 #25
Reliability 10.0 10.0
Consistency 9.3 10.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 88.4% 87.0%
Flaky tests 2 0
Total Runs 69 69
Cost per result 9.118 9.109
Total Cost $1.733 $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 308,056 177,939
Output Tokens 9,434 6,283
Reasoning Tokens 15,572 24,782
Response Time (avg) 25.68s 11.91s
Response Time (max) 89.16s 56.19s
Response Time (total) 590.71s 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.

#26 Claude Opus 5.5

low
Invalid SVG
Cost
$0.038
Time
19.1s
Tokens
2,010 tok

#25 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 10.0 10.0 100.0% 0 12.23s 10,608 575 2,777
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402

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