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

The average score is effectively tied at 9.3 vs 9.3. Claude Opus 5.5 (low) has the lower benchmark cost at $0.952 vs $1.257. GPT-5.5 (low) is faster at 10.15s vs 23.72s, with pass rates of 87.9% vs 86.4%.

Last updated at: 2026-09-23

Compared models

Rank
#20
Total Output Tokens
21,004
Response Time (avg)
23.72s
Total Cost
$0.952
Rank
#18
Total Output Tokens
28,540
Response Time (avg)
10.15s
Total Cost
$1.257
Recommended model GPT-5.5 (low)

It has the best score here (9.3), while responding about 2.3x 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 9.3 9.3
Rank #20 #18
Reliability 10.0 10.0
Consistency 9.3 10.0
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 87.9% 86.4%
Flaky tests 2 0
Total Runs 66 66
Cost per result 5.284 6.614
Total Cost $0.952 $1.257
Input Price $4.000 / 1M $5.000 / 1M
Output Price $20.000 / 1M $30.000 / 1M
Total Input Tokens 132,746 80,067
Output Tokens 6,454 5,378
Reasoning Tokens 14,550 23,162
Response Time (avg) 23.72s 10.15s
Response Time (max) 89.16s 56.19s
Response Time (total) 521.82s 223.24s
Parameters ~5T total (~500B active) ~1.5T total (~100B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#20 Claude Opus 5.5

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

#18 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

Quick Compare

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