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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: Qwen3.5 Plus 2026-02-15 leads on average score with 8.0 vs 7.2. DeepSeek V4 Pro has the lower benchmark cost at $0.034 vs $0.310. DeepSeek V4 Pro is faster at 6.41s vs 73.79s, with pass rates of 52.4% vs 73.0%.

Recommended model: DeepSeek V4 Pro - It offers the best overall trade-off: a competitive score (7.2), lower cost than Qwen3.5 Plus 2026-02-15, and balanced response time.

Last updated at: 2026-06-18

Metric DeepSeek V4 Pro DeepSeek V4 Pro none Release: 2026-04-24 Qwen3.5 Plus 2026-02-15 Qwen3.5 Plus 2026-02-15 medium Release: 2026-02-15
Score 7.2 8.0
Rank #58 #28
Reliability 9.9 10.0
Consistency 8.8 8.8
Tests Correct
Attempt pass rate 52.4% 73.0%
Flaky tests 3 3
Total Runs 63 63
Cost per result 0.333 2.445
Total Cost $0.034 $0.310
Input Price $0.435 / 1M $0.260 / 1M
Output Price $0.870 / 1M $1.560 / 1M
Total Input Tokens 53,558 40,918
Output Tokens 11,424 2,159
Reasoning Tokens 0 189,604
Response Time (avg) 6.41s 73.79s
Response Time (max) 30.09s 266.69s
Response Time (total) 134.66s 1033.07s

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

#28 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 3.2 6.1 16.7% 2 4.02s 540 1,168 0
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 5.6 10.0 33.3% 0 13.38s 7,275 5,500 0
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 9.5 10.0 100.0% 0 23.74s 27,529 2,235 0
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 4.61s 7,568 200 0
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 5.3 10.0 33.3% 0 3.72s 666 24 0
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 5.0 10.0 0.0% 0 2.05s 471 126 0
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 6.3 5.8 66.7% 1 4.12s 627 713 0
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 10.0 10.0 100.0% 0 3.61s 594 442 0
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 10.0 10.0 100.0% 0 7.40s 8,105 328 0
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 5.76s 183 688 0
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 103.81s 204 24 17,130

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