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StepFun: Step 3.5 Flash vs xAI: Grok 4.20 Beta

Last updated at: 2026-03-12

Metric Step 3.5 Flash Step 3.5 Flash medium Release: 2026-02-01 Free Available Grok 4.20 Beta Grok 4.20 Beta medium Release: 2026-03-12
Rank #14 #24
Avg Score 7.4 7.0
Consistency 9.1 9.0
Cost per result 0.000 5.989
Total Cost $0.000 $0.599
Tests Correct
Attempt pass rate 68.8% 70.8%
Flaky tests 2 2
Total Runs 48 48
Output Tokens 71,452 1,481
Reasoning Tokens 155,147 86,628
Response Time (avg) 29.10s 8.89s
Response Time (max) 170.45s 24.21s
Response Time (total) 290.96s 142.18s

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Score vs Total Cost

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Avg Score vs Response Time (avg)

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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
Step 3.5 Flash 10.0 10.0 100.0% 0 18.54s 13,924 17,208
Grok 4.20 Beta 7.0 7.2 88.9% 1 3.19s 262 6,289
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.5 Flash 10.0 10.0 100.0% 0 29.57s 1,176 12,984
Grok 4.20 Beta 10.0 10.0 100.0% 0 20.93s 227 12,212
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.5 Flash 10.0 10.0 100.0% 0 15.01s 600 13,886
Grok 4.20 Beta 9.9 10.0 100.0% 0 4.01s 180 5,281
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.5 Flash 4.0 7.2 44.4% 1 170.45s 45,350 90,436
Grok 4.20 Beta 4.0 10.0 33.3% 0 21.33s 251 40,255
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.5 Flash 6.0 10.0 0.0% 0 6.54s 2,214 2,584
Grok 4.20 Beta 10.0 10.0 100.0% 0 5.78s 72 3,440
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.5 Flash 9.0 6.8 83.3% 1 4.98s 2,284 3,412
Grok 4.20 Beta 9.0 10.0 50.0% 0 4.97s 57 7,107
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.5 Flash 4.0 10.0 33.3% 0 7.72s 5,629 10,835
Grok 4.20 Beta 7.0 7.2 88.9% 1 3.85s 249 6,660
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.5 Flash 10.0 10.0 100.0% 0 11.91s 275 3,802
Grok 4.20 Beta 10.0 10.0 0.0% 0 12.39s 183 5,384

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