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

Last updated at: 2026-06-04

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 8.4 8.0
Rank #15 #21
Reliability 10.0 10.0
Consistency 8.5 8.6
Tests Correct
Attempt pass rate 82.5% 76.2%
Flaky tests 4 4
Total Runs 63 63
Cost per result 4.932 8.640
Total Cost $0.740 $1.210
Input Price $1.750 / 1M $2.500 / 1M
Output Price $14.000 / 1M $15.000 / 1M
Total Input Tokens 34,299 34,108
Output Tokens 2,357 2,242
Reasoning Tokens 46,189 72,707
Response Time (avg) 16.22s 22.35s
Response Time (max) 100.93s 100.41s
Response Time (total) 340.67s 469.29s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 8.7 7.9 91.7% 1 4.16s 606 240 1,722
GPT-5.4 8.3 10.0 75.0% 0 4.11s 606 240 1,511
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.50s 7,302 535 10,890
GPT-5.4 8.8 7.8 88.9% 1 44.36s 7,305 433 24,216
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.56s 11,019 364 2,731
GPT-5.4 10.0 10.0 100.0% 0 20.57s 11,019 301 3,543
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.07s 7,140 234 728
GPT-5.4 10.0 10.0 100.0% 0 5.32s 7,140 234 804
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 5.9 7.2 55.6% 1 64.31s 813 64 25,308
GPT-5.4 5.3 7.2 44.4% 1 74.27s 619 61 34,748
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 4.6 10.0 0.0% 0 4.87s 477 187 331
GPT-5.4 4.7 3.1 33.3% 1 4.92s 477 145 321
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.04s 660 93 693
GPT-5.4 10.0 10.0 100.0% 0 3.11s 660 93 897
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 9.0 7.9 88.9% 1 5.05s 642 356 1,593
GPT-5.4 8.2 7.2 88.9% 1 9.14s 642 441 3,815
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 5,445 254 492
GPT-5.4 10.0 10.0 100.0% 0 13.28s 5,445 264 1,031
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3-Codex 2.8 1.6 33.3% 1 14.43s 195 30 1,701
GPT-5.4 3.0 10.0 0.0% 0 13.95s 195 30 1,821

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