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

Last updated at: 2026-04-14

Metric GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07 Qwen3.5-Flash Qwen3.5-Flash none Release: 2026-02-24
Score 6.3 6.2
Rank #54 #56
Consistency 6.5 9.6
Tests Correct
Attempt pass rate 59.3% 46.3%
Flaky tests 8 1
Total Runs 54 54
Cost per result 0.942 0.070
Total Cost $0.066 $0.006
Input Price $0.050 / 1M $0.065 / 1M
Output Price $0.400 / 1M $0.260 / 1M
Output Tokens 4,980 4,266
Reasoning Tokens 156,288 0
Response Time (avg) 44.13s 3.25s
Response Time (max) 204.02s 13.73s
Response Time (total) 485.47s 58.44s

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 6.7 3.5 66.7% 1 40.73s 480 12,992
Qwen3.5-Flash 10.0 10.0 100.0% 0 1.29s 489 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 8.5 6.8 83.3% 1 11.90s 382 4,096
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 19.81s 869 13,440
Qwen3.5-Flash 3.3 10.0 0.0% 0 5.90s 608 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

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