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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: Qwen3.5-Flash leads on average score with 6.8 vs 6.6. Step 3.5 Flash has the lower benchmark cost at $0.070 vs $0.080. Qwen3.5-Flash is faster at 63.29s vs 72.53s, with pass rates of 71.4% vs 54.0%.

Recommended model: Qwen3.5-Flash - It has the strongest score in this comparison (6.8) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-06-18

Metric Qwen3.5-Flash Qwen3.5-Flash medium Release: 2026-02-24 Step 3.5 Flash Step 3.5 Flash medium Release: 2026-02-01
Score 6.8 6.6
Rank #70 #80
Reliability 10.0 10.0
Consistency 8.1 8.9
Tests Correct
Attempt pass rate 71.4% 54.0%
Flaky tests 5 1
Total Runs 63 60
Cost per result 0.871 0.198
Total Cost $0.080 $0.070
Input Price $0.065 / 1M $0.090 / 1M
Output Price $0.260 / 1M $0.300 / 1M
Total Input Tokens 38,926 34,431
Output Tokens 2,088 91,587
Reasoning Tokens 294,598 195,973
Response Time (avg) 63.29s 72.53s
Response Time (max) 234.29s 453.94s
Response Time (total) 1265.85s 1015.47s

Generation showcase

Hamster playing table tennis

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

#70 Qwen3.5-Flash

medium
Cost
$0.002
Time
25.8s
Tokens
4,294 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 10.0 10.0 100.0% 0 59.11s 672 383 32,992
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 3.7 7.2 22.2% 1 58.87s 6,685 302 90,081
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 10.0 10.0 100.0% 0 17.78s 14,934 483 8,270
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 7.3 5.9 83.3% 1 56.99s 6,061 235 16,237
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 5.3 7.2 44.4% 1 146.50s 581 58 43,615
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 6.1 3.1 66.7% 1 40.05s 516 99 38,486
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 10.0 10.0 100.0% 0 63.49s 699 98 14,139
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 8.2 7.2 88.9% 1 27.61s 381 89 12,457
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 10.33s 8,193 309 1,284
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 48.98s 204 32 37,037
Step 3.5 Flash 3.0 10.0 0.0% 0 108.45s 221 2,354 10,372

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