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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 none Release: 2026-03-12
Rank #14 #52
Avg Score 7.4 4.4
Consistency 9.1 9.1
Cost per result 0.000 2.214
Total Cost $0.000 $0.089
Tests Correct
Attempt pass rate 68.8% 33.3%
Flaky tests 2 2
Total Runs 48 48
Output Tokens 71,452 1,511
Reasoning Tokens 155,147 0
Response Time (avg) 29.10s 1.22s
Response Time (max) 170.45s 6.48s
Response Time (total) 290.96s 19.53s

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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 3.3 7.9 22.2% 1 562ms 245 0
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 0.0% 0 6.48s 282 0
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 601ms 197 0
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 10.0 10.0 0.0% 0 611ms 160 0
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 5.0 10.0 0.0% 0 541ms 87 0
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 4.5 10.0 0.0% 0 687ms 60 0
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 4.0 7.2 55.6% 1 541ms 291 0
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 10.0 100.0% 0 4.79s 189 0

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