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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 none Release: 2026-02-14 Step 3.5 Flash Step 3.5 Flash medium Release: 2026-02-01 Free Available
Rank #45 #14
Avg Score 4.9 7.4
Consistency 7.4 9.1
Cost per result 0.214 0.000
Total Cost $0.015 $0.000
Tests Correct
Attempt pass rate 56.3% 68.8%
Flaky tests 5 2
Total Runs 48 48
Output Tokens 2,743 71,452
Reasoning Tokens 0 155,147
Response Time (avg) 2.49s 29.10s
Response Time (max) 6.70s 170.45s
Response Time (total) 39.91s 290.96s

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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 4.6 22.2% 2 2.93s 703 0
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 0.0% 0 6.59s 498 0
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 1.82s 246 0
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 10.0 7.2 22.2% 1 1.33s 17 0
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 10.0 10.0 100.0% 0 3.45s 294 0
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 1.06s 73 0
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 4.0 4.4 55.6% 2 2.46s 620 0
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 3.94s 292 0
Step 3.5 Flash 10.0 10.0 100.0% 0 11.91s 275 3,802

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