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OpenAI: GPT-5.3-Codex vs Qwen: Qwen3.5 Plus 2026-02-15

Last updated at: 2026-04-14

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 Qwen3.5 Plus 2026-02-15 Qwen3.5 Plus 2026-02-15 none Release: 2026-02-15
Score 8.6 6.8
Rank #5 #46
Consistency 8.7 9.3
Tests Correct
Attempt pass rate 83.3% 53.7%
Flaky tests 3 2
Total Runs 54 54
Cost per result 4.405 0.182
Total Cost $0.573 $0.017
Input Price $1.750 / 1M $0.260 / 1M
Output Price $14.000 / 1M $1.560 / 1M
Output Tokens 2,279 2,461
Reasoning Tokens 35,179 0
Response Time (avg) 15.38s 2.60s
Response Time (max) 100.93s 6.65s
Response Time (total) 276.91s 31.23s

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-5.3-Codex 8.7 7.9 91.7% 1 4.16s 240 1,722
Qwen3.5 Plus 2026-02-15 4.8 10.0 25.0% 0 1.91s 517 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
Qwen3.5 Plus 2026-02-15 6.3 3.7 33.3% 1 3.63s 443 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
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 6.65s 314 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
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 1.89s 243 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
Qwen3.5 Plus 2026-02-15 5.3 10.0 33.3% 0 1.17s 17 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
Qwen3.5 Plus 2026-02-15 4.4 3.0 33.3% 1 2.26s 117 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
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 1.67s 72 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
Qwen3.5 Plus 2026-02-15 7.7 10.0 66.7% 0 2.82s 516 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
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 3.33s 222 0

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