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OpenAI: GPT-5.3-Codex vs HY3 Preview

Last updated at: 2026-04-23

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 HY3 Preview HY3 Preview high Release: 2026-04-22 Free Available
Score 8.6 8.5
Rank #7 #9
Consistency 8.7 8.8
Tests Correct
Attempt pass rate 83.3% 81.5%
Flaky tests 3 3
Total Runs 54 50
Cost per result 4.405 0.000
Total Cost $0.573 $0.000
Input Price $1.750 / 1M $0.000 / 1M
Output Price $14.000 / 1M $0.000 / 1M
Output Tokens 2,279 238,920
Reasoning Tokens 35,179 0
Response Time (avg) 15.38s 55.19s
Response Time (max) 100.93s 149.94s
Response Time (total) 276.91s 938.23s

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Score vs Total Cost

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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
HY3 Preview 10.0 10.0 100.0% 0 32.69s 26,550 0
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
HY3 Preview 10.0 10.0 100.0% 0 99.76s 38,167 0
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
HY3 Preview 10.0 10.0 100.0% 0 113.09s 31,319 0
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
HY3 Preview 6.5 10.0 50.0% 0 12.11s 4,323 0
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
HY3 Preview 5.3 7.2 44.4% 1 109.04s 87,559 0
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
HY3 Preview 10.0 10.0 100.0% 0 24.31s 5,490 0
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
HY3 Preview 8.5 6.8 83.3% 1 34.02s 13,331 0
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
HY3 Preview 9.0 7.9 88.9% 1 28.07s 21,811 0
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
HY3 Preview 10.0 10.0 100.0% 0 78.83s 10,370 0

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