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GPT-5.4 (medium) vs GPT-5.5 (low)

GPT-5.5 (low) leads on average score with 9.5 vs 8.8. GPT-5.5 (low) has the lower benchmark cost at $1.822 vs $2.213. GPT-5.5 (low) is faster at 11.91s vs 24.81s, with pass rates of 78.3% vs 87.0%.

Last updated at: 2026-10-26

Compared models

Rank
#67
Total Output Tokens
96,502
Response Time (avg)
24.81s
Total Cost
$2.213
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 2.1x faster than GPT-5.4 (medium).

Detailed comparison

Metric GPT-5.4 GPT-5.4 medium Release: 2026-03-05 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 8.8 9.5
Rank #67 #25
Reliability 10.0 10.0
Consistency 8.7 10.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 78.3% 87.0%
Flaky tests 4 0
Total Runs 69 69
Cost per result 12.535 9.109
Total Cost $2.213 $1.822
Input Price $2.500 / 1M $5.000 / 1M
Output Price $15.000 / 1M $30.000 / 1M
Cache Read Price $0.250 / 1M $0.500 / 1M
Cache Write Price N/A N/A
Total Input Tokens 223,210 177,939
Output Tokens 7,312 6,283
Reasoning Tokens 89,190 24,782
Response Time (avg) 24.81s 11.91s
Response Time (max) 100.41s 56.19s
Response Time (total) 570.60s 273.82s
Parameters ~1.5T total (~100B 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.

#67 GPT-5.4

medium
Cost
$0.214
Time
199.6s
Tokens
14,349 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
GPT-5.4 8.8 7.8 88.9% 1 44.36s 7,305 433 24,216
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402

Quick Compare

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