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DeepSeek: DeepSeek V4 Flash vs Qwen: Qwen3.5 Plus 2026-04-20

Last updated at: 2026-04-27

Metric DeepSeek V4 Flash DeepSeek V4 Flash high Release: 2026-04-24 Qwen3.5 Plus 2026-04-20 Qwen3.5 Plus 2026-04-20 medium Release: 2026-04-20
Score 7.8 8.1
Rank #41 #32
Reliability 10.0 9.7
Consistency 7.8 9.0
Tests Correct
Attempt pass rate 79.6% 77.8%
Flaky tests 5 2
Total Runs 54 54
Cost per result 0.277 2.065
Total Cost $0.031 $0.269
Input Price $0.140 / 1M $0.400 / 1M
Output Price $0.280 / 1M $2.400 / 1M
Output Tokens 1,765 2,179
Reasoning Tokens 90,299 103,832
Response Time (avg) 45.41s 32.81s
Response Time (max) 218.13s 92.41s
Response Time (total) 817.30s 590.65s

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
DeepSeek V4 Flash 8.3 10.0 75.0% 0 28.51s 140 7,770
Qwen3.5 Plus 2026-04-20 10.0 10.0 100.0% 0 10.84s 215 7,748
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 2026-04-20 7.6 10.0 100.0% 0 85.72s 248 11,081
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 2026-04-20 10.0 10.0 100.0% 0 92.41s 483 17,490
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 2026-04-20 10.0 10.0 100.0% 0 38.32s 270 14,668
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 2026-04-20 2.9 7.2 11.1% 1 53.10s 63 28,414
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 2026-04-20 4.9 9.6 0.0% 0 25.30s 125 4,792
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 2026-04-20 10.0 10.0 100.0% 0 20.25s 103 7,689
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
DeepSeek V4 Flash 6.4 4.5 77.8% 2 25.53s 193 2,597
Qwen3.5 Plus 2026-04-20 8.2 7.2 88.9% 1 17.58s 324 9,786
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 2026-04-20 10.0 10.0 100.0% 0 14.72s 348 2,164

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