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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 6.3 vs 6.0. Qwen3.5 Plus 2026-02-15 has the lower benchmark cost at $0.016 vs $0.079. Qwen3.5 Plus 2026-02-15 is faster at 2.31s vs 65.21s, with pass rates of 52.4% vs 46.0%.

Recommended model: Qwen3.5 Plus 2026-02-15 - It has the best score here (6.3), while costing about 5.0x less than DeepSeek V4 Pro.

Last updated at: 2026-06-10

Metric DeepSeek V4 Pro DeepSeek V4 Pro high Release: 2026-04-24 Qwen3.5 Plus 2026-02-15 Qwen3.5 Plus 2026-02-15 none Release: 2026-02-15
Score 6.0 6.3
Rank #104 #96
Reliability 9.0 10.0
Consistency 7.6 9.4
Tests Correct
Attempt pass rate 52.4% 46.0%
Flaky tests 6 2
Total Runs 63 63
Cost per result 2.869 0.204
Total Cost $0.079 $0.016
Input Price $0.435 / 1M $0.260 / 1M
Output Price $0.870 / 1M $1.560 / 1M
Total Input Tokens 32,240 45,864
Output Tokens 12,250 2,480
Reasoning Tokens 72,257 0
Response Time (avg) 65.21s 2.31s
Response Time (max) 358.35s 6.65s
Response Time (total) 1304.19s 34.63s

Generation showcase

Hamster playing table tennis

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

#104 DeepSeek V4 Pro

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

#96 Qwen3.5 Plus 2026-02-15

none
Cost
$0.012
Time
153.2s
Tokens
7,787 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 6.4 7.9 58.3% 1 16.53s 448 71 3,617
Qwen3.5 Plus 2026-02-15 4.8 10.0 25.0% 0 1.91s 696 517 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 3.3 6.4 11.1% 1 118.23s 1,966 111 20,940
Qwen3.5 Plus 2026-02-15 4.3 7.9 11.1% 1 2.05s 7,913 473 0
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 65.02s 14,016 465 5,914
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 6.65s 18,304 314 0
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 7.3 5.9 83.3% 1 23.62s 5,633 229 1,710
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 1.89s 7,794 243 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 2.9 7.2 11.1% 1 205.66s 430 10,529 28,089
Qwen3.5 Plus 2026-02-15 5.3 10.0 33.3% 0 1.17s 789 17 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 6.1 3.1 66.7% 1 25.09s 314 76 1,152
Qwen3.5 Plus 2026-02-15 4.4 3.0 33.3% 1 2.26s 522 117 0
Instructions following 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 41.16s 627 205 2,416
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 1.67s 711 72 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 5.9 7.2 55.6% 1 34.84s 544 139 4,019
Qwen3.5 Plus 2026-02-15 7.7 10.0 66.7% 0 2.71s 714 494 0
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 21.33s 8,079 372 593
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 3.33s 8,211 222 0
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 39.14s 183 53 3,807
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 1.11s 210 11 0

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