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

Summary

DeepSeek V4 Pro vs Qwen3.5 Plus 2026-02-15 benchmark comparison: DeepSeek V4 Pro leads on average score with 8.1 vs 8.0. DeepSeek V4 Pro has the lower benchmark cost at $0.098 vs $0.310. DeepSeek V4 Pro is faster at 72.22s vs 73.79s, with pass rates of 66.7% vs 73.0%.

Recommended model: DeepSeek V4 Pro - It has the best score here (8.1), while costing about 3.2x less than Qwen3.5 Plus 2026-02-15.

Last updated at: 2026-06-12

Metric DeepSeek V4 Pro DeepSeek V4 Pro high Release: 2026-04-24 Qwen3.5 Plus 2026-02-15 Qwen3.5 Plus 2026-02-15 medium Release: 2026-02-15
Score 8.1 8.0
Rank #30 #32
Reliability 9.6 10.0
Consistency 7.8 8.8
Tests Correct
Attempt pass rate 66.7% 73.0%
Flaky tests 6 3
Total Runs 57 63
Cost per result 0.978 2.445
Total Cost $0.098 $0.310
Input Price $0.435 / 1M $0.260 / 1M
Output Price $0.870 / 1M $1.560 / 1M
Total Input Tokens 35,122 40,918
Output Tokens 6,315 2,159
Reasoning Tokens 93,205 189,604
Response Time (avg) 72.22s 73.79s
Response Time (max) 437.44s 266.69s
Response Time (total) 1444.45s 1033.07s

Generation showcase

Hamster playing table tennis

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

#30 DeepSeek V4 Pro

high
Cost
$0.023
Time
257.6s
Tokens
14,870 tok

#32 Qwen3.5 Plus 2026-02-15

medium
Cost
$0.011
Time
125.5s
Tokens
7,040 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 5.7 5.9 58.3% 2 25.70s 536 149 3,214
Qwen3.5 Plus 2026-02-15 8.2 7.9 83.3% 1 45.78s 672 205 21,236
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 7.7 10.0 66.7% 0 308.19s 1,583 368 42,658
Qwen3.5 Plus 2026-02-15 6.6 7.1 44.4% 1 180.70s 6,950 420 80,595
Combined 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 38.17s 14,060 454 5,836
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 46.85s 14,934 421 7,906
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 25.03s 7,690 274 2,166
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 46.91s 7,782 270 14,916
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 3.6 7.2 22.2% 1 130.09s 472 4,400 26,367
Qwen3.5 Plus 2026-02-15 5.3 10.0 33.3% 0 17.50s 444 35 16,680
General Intelligence 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 8.83s 471 115 1,013
Qwen3.5 Plus 2026-02-15 4.7 1.6 66.7% 1 79.86s 344 73 8,675
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 7.8 6.6 83.3% 1 8.73s 627 66 2,726
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 31.93s 699 101 7,704
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 6.9 4.9 77.8% 2 56.85s 591 178 2,563
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 32.50s 696 301 13,853
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 9.8 10.0 100.0% 0 15.92s 8,909 295 701
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 7.54s 8,193 309 909
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 34.01s 183 16 5,961
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 103.81s 204 24 17,130

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