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DeepSeek: DeepSeek V4 Flash vs Qwen: Qwen3.5-9B

Summary

DeepSeek V4 Flash vs Qwen3.5-9B benchmark comparison: DeepSeek V4 Flash leads on average score with 5.0 vs 4.2. DeepSeek V4 Flash has the lower benchmark cost at $0.008 vs $0.035. DeepSeek V4 Flash is faster at 26.75s vs 82.24s, with pass rates of 30.2% vs 27.0%.

Recommended model: DeepSeek V4 Flash - It has the best score here (5.0), while costing about 4.6x less than Qwen3.5-9B.

Last updated at: 2026-06-04

Metric DeepSeek V4 Flash DeepSeek V4 Flash none Release: 2026-04-24 Qwen3.5-9B Qwen3.5-9B medium Release: 2026-03-02
Score 5.0 4.2
Rank #139 #161
Reliability 10.0 6.7
Consistency 8.9 8.0
Tests Correct
Attempt pass rate 30.2% 27.0%
Flaky tests 3 5
Total Runs 63 63
Cost per result 0.203 1.187
Total Cost $0.008 $0.035
Input Price $0.099 / 1M $0.040 / 1M
Output Price $0.197 / 1M $0.150 / 1M
Total Input Tokens 50,127 17,070
Output Tokens 13,710 29,045
Reasoning Tokens 0 209,516
Response Time (avg) 26.75s 82.24s
Response Time (max) 111.96s 226.38s
Response Time (total) 561.82s 1315.88s

Generation showcase

Hamster playing table tennis

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

#139 DeepSeek V4 Flash

none
Cost
$0.004
Time
157.6s
Tokens
11,297 tok

#161 Qwen3.5-9B

medium
Cost
$0.001
Time
35.9s
Tokens
3,030 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 Flash 3.0 10.0 0.0% 0 20.18s 540 174 0
Qwen3.5-9B 5.1 5.8 50.0% 2 34.44s 369 2,621 12,411
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Flash 4.2 7.4 11.1% 1 17.13s 7,279 9,717 0
Qwen3.5-9B 2.9 10.0 0.0% 0 100.88s 2,396 7,890 41,129
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Flash 4.5 2.1 66.7% 1 111.96s 24,398 2,664 0
Qwen3.5-9B 3.0 10.0 0.0% 0 0ms 0 0 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 Flash 10.0 10.0 100.0% 0 23.79s 7,290 195 0
Qwen3.5-9B 3.6 5.6 33.3% 1 87.31s 4,722 1,383 32,113
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Flash 5.3 10.0 33.3% 0 19.73s 666 18 0
Qwen3.5-9B 3.6 7.2 22.2% 1 137.75s 295 11,549 48,475
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Flash 4.2 9.9 0.0% 0 23.74s 471 67 0
Qwen3.5-9B 2.8 1.6 33.3% 1 226.38s 180 0 30,695
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Flash 6.5 10.0 50.0% 0 17.54s 627 321 0
Qwen3.5-9B 6.5 10.0 50.0% 0 5.75s 381 491 1,824
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Flash 3.1 7.3 11.1% 1 23.72s 594 207 0
Qwen3.5-9B 3.0 10.0 0.0% 0 32.27s 376 1,593 12,026
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Flash 10.0 10.0 100.0% 0 77.93s 8,079 327 0
Qwen3.5-9B 10.0 10.0 100.0% 0 4.31s 8,283 444 1,149
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Flash 3.0 10.0 0.0% 0 3.07s 183 20 0
Qwen3.5-9B 3.0 10.0 0.0% 0 177.02s 68 3,074 29,694

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