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Qwen: Qwen3.5-Flash vs StepFun: Step 3.5 Flash

Summary

Qwen3.5-Flash vs Step 3.5 Flash benchmark comparison: Step 3.5 Flash leads on average score with 6.6 vs 6.1. Qwen3.5-Flash has the lower benchmark cost at $0.005 vs $0.070. Qwen3.5-Flash is faster at 3.58s vs 72.53s, with pass rates of 39.7% vs 54.0%.

Recommended model: Qwen3.5-Flash - Its score stays close to the best score here (6.1 vs 6.6), while costing about 16.7x less than Step 3.5 Flash.

Last updated at: 2026-06-18

Metric Qwen3.5-Flash Qwen3.5-Flash none Release: 2026-02-24 Step 3.5 Flash Step 3.5 Flash medium Release: 2026-02-01
Score 6.1 6.6
Rank #97 #80
Reliability 10.0 10.0
Consistency 9.7 8.9
Tests Correct
Attempt pass rate 39.7% 54.0%
Flaky tests 1 1
Total Runs 63 60
Cost per result 0.075 0.198
Total Cost $0.005 $0.070
Input Price $0.065 / 1M $0.090 / 1M
Output Price $0.260 / 1M $0.300 / 1M
Total Input Tokens 46,439 34,431
Output Tokens 4,276 91,587
Reasoning Tokens 0 195,973
Response Time (avg) 3.58s 72.53s
Response Time (max) 27.18s 453.94s
Response Time (total) 75.28s 1015.47s

Generation showcase

Hamster playing table tennis

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

#97 Qwen3.5-Flash

none
Cost
$0.003
Time
47.4s
Tokens
7,799 tok

#80 Step 3.5 Flash

medium
Cost
$0.008
Time
277.1s
Tokens
23,695 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
Qwen3.5-Flash 3.5 8.3 8.3% 1 1.32s 696 690 0
Step 3.5 Flash 10.0 10.0 100.0% 0 40.57s 694 20,391 24,176
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 5.5 10.0 33.3% 0 850ms 7,913 519 0
Step 3.5 Flash 2.4 5.2 0.0% 0 258.38s 2,211 13,207 22,429
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 3.0 10.0 0.0% 0 6.22s 18,879 1,794 0
Step 3.5 Flash 10.0 10.0 100.0% 0 29.57s 13,638 1,176 12,984
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 10.0 10.0 100.0% 0 1.57s 7,794 243 0
Step 3.5 Flash 10.0 10.0 100.0% 0 15.01s 7,368 600 13,886
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 7.7 10.0 66.7% 0 905ms 789 15 0
Step 3.5 Flash 5.3 7.2 44.4% 1 170.45s 673 45,350 90,436
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 10.0 10.0 100.0% 0 803ms 522 100 0
Step 3.5 Flash 5.5 10.0 0.0% 0 22.39s 509 240 3,506
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 6.3 10.0 50.0% 0 8.81s 711 63 0
Step 3.5 Flash 8.3 10.0 50.0% 0 4.78s 705 2,364 3,521
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 3.1 10.0 0.0% 0 10.89s 714 579 0
Step 3.5 Flash 5.3 10.0 33.3% 0 7.22s 711 5,630 10,861
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 10.0 10.0 100.0% 0 3.67s 8,211 264 0
Step 3.5 Flash 10.0 10.0 100.0% 0 11.91s 7,701 275 3,802
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Qwen3.5-Flash 3.0 10.0 0.0% 0 588ms 210 9 0
Step 3.5 Flash 3.0 10.0 0.0% 0 108.45s 221 2,354 10,372

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