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OpenAI: GPT-5.2 Chat vs OpenAI: GPT-5.3-Codex

Last updated at: 2026-03-15

Metric GPT-5.2 Chat GPT-5.2 Chat none Release: 2025-12-11 GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05
Rank #17 #5
Score 8.0 8.7
Consistency 9.1 9.1
Cost per result 2.440 4.485
Total Cost $0.269 $0.539
Tests Correct
Attempt pass rate 75.0% 83.3%
Flaky tests 2 2
Total Runs 48 48
Output Tokens 15,845 1,764
Reasoning Tokens 0 33,348
Response Time (avg) 7.03s 16.59s
Response Time (max) 38.52s 100.93s
Response Time (total) 112.51s 265.39s

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-5.2 Chat 10.0 10.0 100.0% 0 3.97s 1,651 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 4.69s 216 1,421
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 9.12s 1,243 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.56s 364 2,731
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 3.05s 980 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.07s 234 728
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.2 Chat 5.3 10.0 33.3% 0 17.78s 7,810 0
GPT-5.3-Codex 5.9 7.2 55.6% 1 64.31s 64 25,308
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.2 Chat 4.4 3.0 33.3% 1 3.20s 335 0
GPT-5.3-Codex 4.6 10.0 0.0% 0 4.87s 187 331
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.2 Chat 7.5 6.1 83.3% 1 5.46s 1,528 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.04s 93 693
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.2 Chat 7.7 10.0 66.7% 0 4.42s 1,743 0
GPT-5.3-Codex 9.0 7.9 88.9% 1 5.12s 352 1,644
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 4.68s 555 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492

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