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

GPT-5.5 (medium) leads on average score with 9.2 vs 8.8. GPT-5.4 (medium) has the lower benchmark cost at $2.006 vs $4.809. GPT-5.4 (medium) is faster at 24.81s vs 39.86s, with pass rates of 78.3% vs 88.4%.

Last updated at: 2026-10-01

Compared models

Rank
#50
Total Output Tokens
96,502
Response Time (avg)
24.81s
Total Cost
$2.006
Rank
#30
Total Output Tokens
130,107
Response Time (avg)
39.86s
Total Cost
$4.809
Recommended model GPT-5.4 (medium)

Its score stays close to the best score here (8.8 vs 9.2), while costing about 2.4x less than GPT-5.5 (medium).

Detailed comparison

Metric GPT-5.4 GPT-5.4 medium Release: 2026-03-05 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 8.8 9.2
Rank #50 #30
Reliability 10.0 10.0
Consistency 8.7 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 78.3% 88.4%
Flaky tests 4 3
Total Runs 69 69
Cost per result 12.535 25.306
Total Cost $2.006 $4.809
Input Price $2.500 / 1M $5.000 / 1M
Output Price $15.000 / 1M $30.000 / 1M
Total Input Tokens 223,210 180,959
Output Tokens 7,312 6,472
Reasoning Tokens 89,190 123,635
Response Time (avg) 24.81s 39.86s
Response Time (max) 100.41s 332.10s
Response Time (total) 570.60s 916.82s
Parameters ~1.5T total (~100B 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.

#50 GPT-5.4

medium
Cost
$0.214
Time
199.6s
Tokens
14,349 tok

#30 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 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 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959

Quick Compare

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