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ByteDance Seed: Seed-2.0-Lite vs StepFun: Step 3.5 Flash

Last updated at: 2026-03-12

Metric Seed-2.0-Lite Seed-2.0-Lite medium Release: 2026-02-14 Step 3.5 Flash Step 3.5 Flash medium Release: 2026-02-01 Free Available
Rank #3 #14
Avg Score 8.5 7.4
Consistency 8.7 9.1
Cost per result 0.870 0.000
Total Cost $0.105 $0.000
Tests Correct
Attempt pass rate 87.5% 68.8%
Flaky tests 3 2
Total Runs 48 48
Output Tokens 2,815 71,452
Reasoning Tokens 44,618 155,147
Response Time (avg) 29.39s 29.10s
Response Time (max) 168.71s 170.45s
Response Time (total) 470.29s 290.96s

Top Models by Score

Score vs Total Cost

Response Time (avg)

Avg Score vs Response Time (avg)

Total Output Tokens

Avg Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Seed-2.0-Lite 10.0 10.0 100.0% 0 23.34s 990 7,037
Step 3.5 Flash 10.0 10.0 100.0% 0 18.54s 13,924 17,208
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Seed-2.0-Lite 10.0 10.0 100.0% 0 37.67s 506 4,299
Step 3.5 Flash 10.0 10.0 100.0% 0 29.57s 1,176 12,984
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Seed-2.0-Lite 9.9 10.0 100.0% 0 9.07s 246 1,742
Step 3.5 Flash 10.0 10.0 100.0% 0 15.01s 600 13,886
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Seed-2.0-Lite 4.0 7.2 55.6% 1 88.74s 15 23,897
Step 3.5 Flash 4.0 7.2 44.4% 1 170.45s 45,350 90,436
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Seed-2.0-Lite 7.0 3.6 66.7% 1 18.25s 304 1,620
Step 3.5 Flash 6.0 10.0 0.0% 0 6.54s 2,214 2,584
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Seed-2.0-Lite 10.0 10.0 100.0% 0 7.26s 71 1,480
Step 3.5 Flash 9.0 6.8 83.3% 1 4.98s 2,284 3,412
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Seed-2.0-Lite 9.3 7.9 88.9% 1 11.03s 461 3,532
Step 3.5 Flash 4.0 10.0 33.3% 0 7.72s 5,629 10,835
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Seed-2.0-Lite 10.0 10.0 100.0% 0 12.38s 222 1,011
Step 3.5 Flash 10.0 10.0 100.0% 0 11.91s 275 3,802

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