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Qwen: Qwen3.5 Plus 2026-02-15 vs xAI: Grok 4.20

Last updated at: 2026-04-02

Metric Qwen3.5 Plus 2026-02-15 Qwen3.5 Plus 2026-02-15 none Release: 2026-02-15 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 6.8 7.1
Rank #46 #40
Consistency 9.6 8.2
Tests Correct
Attempt pass rate 54.9% 66.7%
Flaky tests 1 4
Total Runs 51 51
Cost per result 0.172 7.358
Total Cost $0.016 $0.663
Input Price $0.260 / 1M $2.000 / 1M
Output Price $1.560 / 1M $6.000 / 1M
Output Tokens 2,018 1,494
Reasoning Tokens 0 97,078
Response Time (avg) 2.51s 9.50s
Response Time (max) 6.65s 29.87s
Response Time (total) 27.60s 161.54s

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
Qwen3.5 Plus 2026-02-15 4.8 10.0 25.0% 0 1.91s 517 0
Grok 4.20 8.2 7.9 83.3% 1 3.36s 280 8,476
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 6.65s 314 0
Grok 4.20 10.0 10.0 100.0% 0 17.40s 232 9,556
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 1.89s 243 0
Grok 4.20 10.0 10.0 100.0% 0 4.17s 180 5,333
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5 Plus 2026-02-15 5.3 10.0 33.3% 0 1.17s 17 0
Grok 4.20 5.3 10.0 33.3% 0 27.03s 375 49,339
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5 Plus 2026-02-15 4.4 3.0 33.3% 1 2.26s 117 0
Grok 4.20 5.8 2.8 66.7% 1 7.09s 47 4,252
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 1.67s 72 0
Grok 4.20 7.3 5.9 83.3% 1 4.42s 40 5,474
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5 Plus 2026-02-15 7.7 10.0 66.7% 0 2.82s 516 0
Grok 4.20 6.4 7.7 55.6% 1 3.89s 143 8,028
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 3.33s 222 0
Grok 4.20 3.0 10.0 0.0% 0 13.68s 197 6,620

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