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OpenAI: GPT-5.3-Codex vs Qwen: Qwen3.5-Flash

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Last updated at : 2026-02-27 15:16

Summary

Metric OpenAI: GPT-5.3-Codex medium Release: Unknown release date Qwen: Qwen3.5-Flash medium Release: Unknown release date
Rank #7 #24
Score 7.93 5.79
Consistency 8.84 7.60
Cost per result 4.641 0.650
Total Cost $0.465 $0.046
Tests Correct
Wrong Tests 4 7
Attempt pass rate 78.6% 66.7%
Flaky tests 2 4
Output Tokens 1,201 1,194
Reasoning Tokens 30,056 108,368

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 216 1,421
Qwen: Qwen3.5-Flash 10.00 10.00 100.0% 0 363 23,645
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 234 735
Qwen: Qwen3.5-Flash 5.50 5.87 83.3% 1 235 16,237
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 4.00 7.21 55.6% 1 64 25,308
Qwen: Qwen3.5-Flash 1.00 4.41 33.3% 2 52 34,605
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 9.00 10.00 50.0% 0 93 693
Qwen: Qwen3.5-Flash 7.50 9.91 50.0% 0 98 14,139
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 7.00 7.38 77.8% 1 340 1,407
Qwen: Qwen3.5-Flash 4.00 7.21 55.6% 1 137 18,458
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 254 492
Qwen: Qwen3.5-Flash 10.00 10.00 100.0% 0 309 1,284

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