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Anthropic: Claude Sonnet 4.6 vs Qwen: Qwen3.5 Plus 2026-02-15

Last updated at: 2026-05-19

Metric Claude Sonnet 4.6 Claude Sonnet 4.6 none Release: 2026-02-17 Qwen3.5 Plus 2026-02-15 Qwen3.5 Plus 2026-02-15 none Release: 2026-02-15
Score 7.2 6.5
Rank #68 #83
Reliability 10.0 10.0
Consistency 9.6 9.3
Tests Correct
Attempt pass rate 61.4% 50.9%
Flaky tests 1 2
Total Runs 57 57
Cost per result 2.441 0.183
Total Cost $0.269 $0.017
Input Price $3.000 / 1M $0.260 / 1M
Output Price $15.000 / 1M $1.560 / 1M
Output Tokens 7,864 2,472
Reasoning Tokens 0 0
Response Time (avg) 4.96s 2.49s
Response Time (max) 23.84s 6.65s
Response Time (total) 59.50s 32.33s

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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
Claude Sonnet 4.6 4.8 10.0 25.0% 0 2.94s 1,214 0
Qwen3.5 Plus 2026-02-15 4.8 10.0 25.0% 0 1.91s 517 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 3.67s 523 0
Qwen3.5 Plus 2026-02-15 6.3 3.7 33.3% 1 3.63s 443 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 9.5 10.0 100.0% 0 23.84s 3,766 0
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 6.65s 314 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 3.43s 252 0
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 1.89s 243 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 7.7 10.0 66.7% 0 3.54s 413 0
Qwen3.5 Plus 2026-02-15 5.3 10.0 33.3% 0 1.17s 17 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 6.1 3.1 66.7% 1 2.56s 192 0
Qwen3.5 Plus 2026-02-15 4.4 3.0 33.3% 1 2.26s 117 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 6.5 10.0 50.0% 0 1.96s 90 0
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 1.67s 72 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 7.7 10.0 66.7% 0 2.92s 536 0
Qwen3.5 Plus 2026-02-15 7.7 10.0 66.7% 0 2.82s 516 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 4.11s 447 0
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 3.33s 222 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 3.0 10.0 0.0% 0 4.67s 431 0
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 1.11s 11 0

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