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

Summary

DeepSeek V4 Pro vs Qwen3.5-Flash benchmark comparison: DeepSeek V4 Pro leads on average score with 7.2 vs 6.8. DeepSeek V4 Pro has the lower benchmark cost at $0.034 vs $0.080. DeepSeek V4 Pro is faster at 6.41s vs 63.29s, with pass rates of 52.4% vs 71.4%.

Recommended model: DeepSeek V4 Pro - It has the best score here (7.2), while costing about 2.4x less than Qwen3.5-Flash.

Last updated at: 2026-06-18

Metric DeepSeek V4 Pro DeepSeek V4 Pro none Release: 2026-04-24 Qwen3.5-Flash Qwen3.5-Flash medium Release: 2026-02-24
Score 7.2 6.8
Rank #58 #70
Reliability 9.9 10.0
Consistency 8.8 8.1
Tests Correct
Attempt pass rate 52.4% 71.4%
Flaky tests 3 5
Total Runs 63 63
Cost per result 0.333 0.871
Total Cost $0.034 $0.080
Input Price $0.435 / 1M $0.065 / 1M
Output Price $0.870 / 1M $0.260 / 1M
Total Input Tokens 53,558 38,926
Output Tokens 11,424 2,088
Reasoning Tokens 0 294,598
Response Time (avg) 6.41s 63.29s
Response Time (max) 30.09s 234.29s
Response Time (total) 134.66s 1265.85s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#58 DeepSeek V4 Pro

none
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 tok

#70 Qwen3.5-Flash

medium
Cost
$0.002
Time
25.8s
Tokens
4,294 tok

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) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 3.2 6.1 16.7% 2 4.02s 540 1,168 0
Qwen3.5-Flash 10.0 10.0 100.0% 0 59.11s 672 383 32,992
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 5.6 10.0 33.3% 0 13.38s 7,275 5,500 0
Qwen3.5-Flash 3.7 7.2 22.2% 1 58.87s 6,685 302 90,081
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 9.5 10.0 100.0% 0 23.74s 27,529 2,235 0
Qwen3.5-Flash 10.0 10.0 100.0% 0 17.78s 14,934 483 8,270
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 10.0 10.0 100.0% 0 4.61s 7,568 200 0
Qwen3.5-Flash 7.3 5.9 83.3% 1 56.99s 6,061 235 16,237
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 5.3 10.0 33.3% 0 3.72s 666 24 0
Qwen3.5-Flash 5.3 7.2 44.4% 1 146.50s 581 58 43,615
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 5.0 10.0 0.0% 0 2.05s 471 126 0
Qwen3.5-Flash 6.1 3.1 66.7% 1 40.05s 516 99 38,486
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 6.3 5.8 66.7% 1 4.12s 627 713 0
Qwen3.5-Flash 10.0 10.0 100.0% 0 63.49s 699 98 14,139
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 10.0 10.0 100.0% 0 3.61s 594 442 0
Qwen3.5-Flash 8.2 7.2 88.9% 1 27.61s 381 89 12,457
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 10.0 10.0 100.0% 0 7.40s 8,105 328 0
Qwen3.5-Flash 10.0 10.0 100.0% 0 10.33s 8,193 309 1,284
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 3.0 10.0 0.0% 0 5.76s 183 688 0
Qwen3.5-Flash 3.0 10.0 0.0% 0 48.98s 204 32 37,037

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