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DeepSeek: DeepSeek V4 Flash vs Qwen: Qwen3.5 Plus 2026-02-15

Last updated at: 2026-05-08

Metric DeepSeek V4 Flash DeepSeek V4 Flash high Release: 2026-04-24 Qwen3.5 Plus 2026-02-15 Qwen3.5 Plus 2026-02-15 medium Release: 2026-02-15
Score 7.6 8.2
Rank #48 #12
Reliability 10.0 10.0
Consistency 7.9 9.1
Tests Correct
Attempt pass rate 75.4% 79.0%
Flaky tests 5 2
Total Runs 57 57
Cost per result 0.299 1.758
Total Cost $0.033 $0.247
Input Price $0.140 / 1M $0.260 / 1M
Output Price $0.280 / 1M $1.560 / 1M
Output Tokens 10,281 2,145
Reasoning Tokens 98,830 129,019
Response Time (avg) 45.88s 51.33s
Response Time (max) 218.13s 120.91s
Response Time (total) 871.76s 616.01s

Top Models by Score

Score vs Total Cost

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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
DeepSeek V4 Flash 8.3 10.0 75.0% 0 28.51s 140 7,770
Qwen3.5 Plus 2026-02-15 8.2 7.9 83.3% 1 45.78s 205 21,236
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 10.0 10.0 100.0% 0 62.48s 369 9,361
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 120.91s 367 19,367
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 10.0 10.0 100.0% 0 76.57s 465 7,347
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 46.85s 421 7,906
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 10.0 10.0 100.0% 0 28.03s 201 1,179
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 46.91s 270 14,916
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 4.1 4.4 44.5% 2 100.31s 27 59,249
Qwen3.5 Plus 2026-02-15 5.3 10.0 33.3% 0 17.50s 35 16,680
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 6.1 3.1 66.7% 1 25.15s 79 632
Qwen3.5 Plus 2026-02-15 4.7 1.6 66.7% 1 79.86s 73 8,675
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 10.0 10.0 100.0% 0 15.36s 63 1,622
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 31.93s 101 7,704
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 6.4 4.4 77.8% 2 25.53s 193 2,597
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 34.57s 340 14,496
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 10.0 10.0 100.0% 0 74.73s 228 542
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 7.54s 309 909
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 3.0 10.0 0.0% 0 54.46s 8,516 8,531
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 103.81s 24 17,130

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