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OpenAI: GPT-5.4 vs OpenAI: GPT-5.5

Last updated at: 2026-04-26

Metric GPT-5.4 GPT-5.4 medium Release: 2026-03-05 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 8.2 9.0
Rank #19 #5
Reliability N/A 10.0
Consistency 8.7 9.6
Tests Correct
Attempt pass rate 79.6% 87.0%
Flaky tests 3 1
Total Runs 54 54
Cost per result 6.399 4.534
Total Cost $0.832 $0.681
Input Price $2.500 / 1M $5.000 / 1M
Output Price $15.000 / 1M $30.000 / 1M
Output Tokens 2,169 1,959
Reasoning Tokens 48,732 16,134
Response Time (avg) 18.63s 8.39s
Response Time (max) 100.41s 56.19s
Response Time (total) 335.26s 151.01s

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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 8.3 10.0 75.0% 0 4.11s 240 1,511
GPT-5.5 10.0 10.0 100.0% 0 4.15s 232 1,056
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 10.0 10.0 100.0% 0 13.03s 389 2,045
GPT-5.5 10.0 10.0 100.0% 0 7.79s 369 936
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 10.0 10.0 100.0% 0 20.57s 301 3,543
GPT-5.5 10.0 10.0 100.0% 0 9.56s 303 717
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 10.0 10.0 100.0% 0 5.32s 234 804
GPT-5.5 10.0 10.0 100.0% 0 3.28s 228 157
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 5.3 7.2 44.4% 1 74.27s 61 34,748
GPT-5.5 5.3 10.0 33.3% 0 27.57s 69 11,731
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 4.7 3.1 33.3% 1 4.92s 145 321
GPT-5.5 10.0 10.0 100.0% 0 3.45s 143 132
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 10.0 10.0 100.0% 0 3.11s 93 897
GPT-5.5 9.9 10.0 100.0% 0 2.98s 93 356
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 8.2 7.2 88.9% 1 9.13s 442 3,832
GPT-5.5 9.0 7.9 88.9% 1 4.48s 272 948
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 10.0 10.0 100.0% 0 13.28s 264 1,031
GPT-5.5 10.0 10.0 100.0% 0 4.96s 250 101

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