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OpenAI: GPT-5 Nano vs Qwen: Qwen3.5-Flash

Last updated at: 2026-05-29

Metric GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07 Qwen3.5-Flash Qwen3.5-Flash none Release: 2026-02-24
Score 6.1 5.9
Rank #101 #104
Reliability 10.0 10.0
Consistency 7.1 9.7
Tests Correct
Attempt pass rate 55.0% 41.7%
Flaky tests 7 1
Total Runs 60 60
Cost per result 0.952 0.073
Total Cost $0.077 $0.006
Input Price $0.050 / 1M $0.065 / 1M
Output Price $0.400 / 1M $0.260 / 1M
Output Tokens 5,328 4,270
Reasoning Tokens 181,056 0
Response Time (avg) 43.52s 3.74s
Response Time (max) 204.02s 27.18s
Response Time (total) 565.82s 74.71s

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 Nano 6.5 7.9 58.3% 1 25.50s 1,221 21,184
Qwen3.5-Flash 3.5 8.3 8.3% 1 1.32s 690 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 5.4 6.6 33.3% 1 47.80s 604 30,144
Qwen3.5-Flash 6.8 10.0 50.0% 0 993ms 513 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 10.0 10.0 100.0% 0 65.96s 578 17,984
Qwen3.5-Flash 3.0 10.0 0.0% 0 6.22s 1,794 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 3.7 1.7 50.0% 2 21.42s 453 10,560
Qwen3.5-Flash 10.0 10.0 100.0% 0 1.57s 243 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 5.2 4.4 55.6% 2 204.02s 237 64,448
Qwen3.5-Flash 7.7 10.0 66.7% 0 905ms 15 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 4.1 10.0 0.0% 0 17.51s 202 4,608
Qwen3.5-Flash 10.0 10.0 100.0% 0 803ms 100 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 9.8 10.0 100.0% 0 15.64s 312 4,736
Qwen3.5-Flash 6.3 10.0 50.0% 0 8.81s 63 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 5.3 7.2 44.4% 1 20.63s 929 14,272
Qwen3.5-Flash 3.1 10.0 0.0% 0 10.89s 579 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 10.0 10.0 100.0% 0 33.30s 558 6,976
Qwen3.5-Flash 10.0 10.0 100.0% 0 3.67s 264 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5 Nano 3.0 10.0 0.0% 0 20.13s 234 6,144
Qwen3.5-Flash 3.0 10.0 0.0% 0 588ms 9 0

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