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OpenAI: GPT-5.3-Codex vs Qwen: Qwen3.5-27B

Last updated at: 2026-04-14

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 Qwen3.5-27B Qwen3.5-27B medium Release: 2026-02-24
Score 8.6 8.4
Rank #5 #8
Consistency 8.7 8.8
Tests Correct
Attempt pass rate 83.3% 81.5%
Flaky tests 3 3
Total Runs 54 54
Cost per result 4.405 3.822
Total Cost $0.573 $0.497
Input Price $1.750 / 1M $0.195 / 1M
Output Price $14.000 / 1M $1.560 / 1M
Output Tokens 2,279 2,500
Reasoning Tokens 35,179 242,500
Response Time (avg) 15.38s 53.03s
Response Time (max) 100.93s 163.96s
Response Time (total) 276.91s 954.46s

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
Qwen3.5-27B 8.7 7.9 91.7% 1 19.75s 569 31,505
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
Qwen3.5-27B 10.0 10.0 100.0% 0 70.35s 375 19,165
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
Qwen3.5-27B 10.0 10.0 100.0% 0 163.96s 483 9,991
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
Qwen3.5-27B 10.0 10.0 100.0% 0 30.26s 270 16,150
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
Qwen3.5-27B 5.3 10.0 33.3% 0 79.53s 43 52,368
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
Qwen3.5-27B 6.1 3.1 66.7% 1 101.41s 70 23,147
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
Qwen3.5-27B 10.0 10.0 100.0% 0 19.66s 97 11,638
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
Qwen3.5-27B 8.2 7.7 77.8% 1 64.61s 245 77,213
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
Qwen3.5-27B 10.0 10.0 100.0% 0 7.45s 348 1,323

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