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OpenAI: GPT-5.3-Codex vs OpenAI: GPT-5.4

Last updated at: 2026-04-16

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 GPT-5.4 GPT-5.4 medium Release: 2026-03-05
Score 8.6 8.2
Rank #7 #16
Consistency 8.7 8.7
Tests Correct
Attempt pass rate 83.3% 79.6%
Flaky tests 3 3
Total Runs 54 54
Cost per result 4.405 6.399
Total Cost $0.573 $0.832
Input Price $1.750 / 1M $2.500 / 1M
Output Price $14.000 / 1M $15.000 / 1M
Output Tokens 2,279 2,169
Reasoning Tokens 35,179 48,732
Response Time (avg) 15.38s 18.63s
Response Time (max) 100.93s 100.41s
Response Time (total) 276.91s 335.26s

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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-5.3-Codex 8.7 7.9 91.7% 1 4.16s 240 1,722
GPT-5.4 8.3 10.0 75.0% 0 4.11s 240 1,511
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 8.95s 491 1,530
GPT-5.4 10.0 10.0 100.0% 0 13.03s 389 2,045
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.56s 364 2,731
GPT-5.4 10.0 10.0 100.0% 0 20.57s 301 3,543
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.07s 234 728
GPT-5.4 10.0 10.0 100.0% 0 5.32s 234 804
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 5.9 7.2 55.6% 1 64.31s 64 25,308
GPT-5.4 5.3 7.2 44.4% 1 74.27s 61 34,748
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 4.6 10.0 0.0% 0 4.87s 187 331
GPT-5.4 4.7 3.1 33.3% 1 4.92s 145 321
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.04s 93 693
GPT-5.4 10.0 10.0 100.0% 0 3.11s 93 897
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 9.0 7.9 88.9% 1 5.12s 352 1,644
GPT-5.4 8.2 7.2 88.9% 1 9.13s 442 3,832
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492
GPT-5.4 10.0 10.0 100.0% 0 13.28s 264 1,031

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