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OpenAI: GPT-5 Nano vs Qwen: Qwen3.5-27B

Last updated at: 2026-04-14

Metric GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07 Qwen3.5-27B Qwen3.5-27B none Release: 2026-02-24
Score 6.3 5.9
Rank #54 #64
Consistency 6.5 9.2
Tests Correct
Attempt pass rate 59.3% 38.9%
Flaky tests 8 2
Total Runs 54 54
Cost per result 0.942 0.265
Total Cost $0.066 $0.016
Input Price $0.050 / 1M $0.195 / 1M
Output Price $0.400 / 1M $1.560 / 1M
Output Tokens 4,980 3,545
Reasoning Tokens 156,288 0
Response Time (avg) 44.13s 1.74s
Response Time (max) 204.02s 9.39s
Response Time (total) 485.47s 31.32s

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Score vs Response Time (avg)

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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
Qwen3.5-27B 4.8 10.0 25.0% 0 788ms 267 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
Qwen3.5-27B 10.0 10.0 100.0% 0 2.51s 381 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
Qwen3.5-27B 2.8 1.6 33.3% 1 9.39s 1,461 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
Qwen3.5-27B 10.0 10.0 100.0% 0 1.43s 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
Qwen3.5-27B 3.0 10.0 0.0% 0 540ms 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
Qwen3.5-27B 5.0 10.0 0.0% 0 2.51s 126 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
Qwen3.5-27B 4.8 10.0 0.0% 0 815ms 69 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
Qwen3.5-27B 6.7 7.9 55.6% 1 1.37s 680 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
Qwen3.5-27B 10.0 10.0 100.0% 0 3.54s 303 0

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