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DeepSeek: DeepSeek V4 Flash vs Qwen: Qwen3.5-Flash

Last updated at: 2026-04-25

Metric DeepSeek V4 Flash DeepSeek V4 Flash high Release: 2026-04-24 Qwen3.5-Flash Qwen3.5-Flash medium Release: 2026-02-24
Score 7.8 7.8
Rank #36 #38
Reliability 10.0 N/A
Consistency 7.8 7.3
Tests Correct
Attempt pass rate 79.6% 81.5%
Flaky tests 5 6
Total Runs 54 54
Cost per result 0.277 0.719
Total Cost $0.031 $0.080
Input Price $0.140 / 1M $0.065 / 1M
Output Price $0.280 / 1M $0.260 / 1M
Output Tokens 1,765 2,073
Reasoning Tokens 90,299 191,899
Response Time (avg) 45.41s 66.72s
Response Time (max) 218.13s 234.29s
Response Time (total) 817.30s 1201.03s

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-Flash 10.0 10.0 100.0% 0 59.11s 383 32,992
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-Flash 4.7 1.6 66.7% 1 45.75s 246 12,600
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-Flash 10.0 10.0 100.0% 0 17.78s 483 8,270
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-Flash 7.3 5.9 83.3% 1 56.99s 235 16,237
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-Flash 5.3 7.2 44.4% 1 146.50s 58 43,615
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-Flash 6.1 3.1 66.7% 1 40.05s 99 38,486
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-Flash 10.0 10.0 100.0% 0 63.49s 98 14,139
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-Flash 6.4 4.4 77.8% 2 56.74s 162 24,276
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-Flash 10.0 10.0 100.0% 0 10.33s 309 1,284

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