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Google: Gemini 3.1 Flash Lite Preview vs OpenAI: GPT-5.3-Codex

Last updated at: 2026-03-15

Metric Gemini 3.1 Flash Lite Preview Gemini 3.1 Flash Lite Preview medium Release: 2026-03-03 GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05
Rank #16 #5
Score 8.0 8.7
Consistency 10.0 9.1
Cost per result 0.443 4.485
Total Cost $0.049 $0.539
Tests Correct
Attempt pass rate 68.8% 83.3%
Flaky tests 0 2
Total Runs 48 48
Output Tokens 1,731 1,764
Reasoning Tokens 25,821 33,348
Response Time (avg) 3.83s 16.59s
Response Time (max) 14.93s 100.93s
Response Time (total) 61.25s 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
Gemini 3.1 Flash Lite Preview 8.8 10.0 66.7% 0 2.53s 564 3,780
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
Gemini 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 14.93s 327 7,347
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 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 2.29s 279 2,952
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 3.1 Flash Lite Preview 3.0 10.0 0.0% 0 4.21s 18 5,325
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 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 3.16s 96 1,488
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 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 1.91s 72 2,121
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 3.1 Flash Lite Preview 7.7 10.0 66.7% 0 3.58s 141 1,896
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 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 3.80s 234 912
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492

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