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Qwen: Qwen3.5-27B vs xAI: Grok 4.20

Last updated at: 2026-04-02

Metric Qwen3.5-27B Qwen3.5-27B none Release: 2026-02-24 Grok 4.20 Grok 4.20 none Release: 2026-03-31
Score 5.6 5.4
Rank #65 #69
Consistency 9.1 9.5
Tests Correct
Attempt pass rate 35.3% 31.4%
Flaky tests 2 1
Total Runs 51 51
Cost per result 0.303 1.809
Total Cost $0.016 $0.091
Input Price $0.195 / 1M $2.000 / 1M
Output Price $1.560 / 1M $6.000 / 1M
Output Tokens 3,164 1,655
Reasoning Tokens 0 0
Response Time (avg) 1.70s 1.11s
Response Time (max) 9.39s 6.04s
Response Time (total) 28.82s 18.80s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5-27B 4.8 10.0 25.0% 0 788ms 267 0
Grok 4.20 4.8 10.0 25.0% 0 501ms 267 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5-27B 2.8 1.6 33.3% 1 9.39s 1,461 0
Grok 4.20 3.0 10.0 0.0% 0 6.04s 282 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5-27B 10.0 10.0 100.0% 0 1.43s 243 0
Grok 4.20 10.0 10.0 100.0% 0 522ms 207 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5-27B 3.0 10.0 0.0% 0 540ms 15 0
Grok 4.20 3.0 10.0 0.0% 0 687ms 325 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5-27B 5.0 10.0 0.0% 0 2.51s 126 0
Grok 4.20 4.8 10.0 0.0% 0 659ms 83 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5-27B 4.8 10.0 0.0% 0 815ms 69 0
Grok 4.20 4.8 10.0 0.0% 0 455ms 60 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5-27B 6.7 7.9 55.6% 1 1.37s 680 0
Grok 4.20 5.3 7.4 44.4% 1 487ms 242 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5-27B 10.0 10.0 100.0% 0 3.54s 303 0
Grok 4.20 10.0 10.0 100.0% 0 4.63s 189 0

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