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Gemini 3 PRO Preview vs OpenAI: GPT-5.3-Codex

Last updated at: 2026-04-14

Metric Gemini 3 PRO Preview Gemini 3 PRO Preview medium Release: 2025-11-18 GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05
Score 8.4 8.6
Rank #10 #5
Consistency 10.0 8.7
Tests Correct
Attempt pass rate 77.8% 83.3%
Flaky tests 0 3
Total Runs 54 54
Cost per result 1.406 4.405
Total Cost $0.197 $0.573
Input Price $0.000 / 1M $1.750 / 1M
Output Price $0.000 / 1M $14.000 / 1M
Output Tokens 1,508 2,279
Reasoning Tokens 10,084 35,179
Response Time (avg) 9.06s 15.38s
Response Time (max) 26.24s 100.93s
Response Time (total) 90.58s 276.91s

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
Gemini 3 PRO Preview 10.0 10.0 100.0% 0 14.99s 149 1,485
GPT-5.3-Codex 8.7 7.9 91.7% 1 4.16s 240 1,722
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 PRO Preview 3.0 10.0 0.0% 0 0ms 0 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 8.95s 491 1,530
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 PRO Preview 3.0 10.0 0.0% 0 10.37s 351 952
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
Gemini 3 PRO Preview 10.0 10.0 100.0% 0 10.84s 279 3,156
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
Gemini 3 PRO Preview 5.3 10.0 33.3% 0 7.01s 15 1,195
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
Gemini 3 PRO Preview 10.0 10.0 100.0% 0 9.34s 78 374
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
Gemini 3 PRO Preview 9.8 10.0 100.0% 0 3.26s 69 754
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
Gemini 3 PRO Preview 10.0 10.0 100.0% 0 3.91s 243 1,197
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
Gemini 3 PRO Preview 10.0 10.0 100.0% 0 11.96s 324 971
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492

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