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StepFun: Step 3.7 Flash vs xAI: Grok 4.20

Last updated at: 2026-05-29

Metric Step 3.7 Flash Step 3.7 Flash high Release: 2026-05-29 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.1 7.0
Rank #74 #80
Reliability 10.0 10.0
Consistency 8.2 8.4
Tests Correct
Attempt pass rate 65.8% 63.3%
Flaky tests 4 4
Total Runs 60 60
Cost per result 8.723 7.616
Total Cost $0.960 $0.838
Input Price $0.200 / 1M $1.250 / 1M
Output Price $1.150 / 1M $2.500 / 1M
Output Tokens 828,084 1,816
Reasoning Tokens 0 157,251
Response Time (avg) 49.43s 19.08s
Response Time (max) 192.75s 105.80s
Response Time (total) 988.58s 381.60s

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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 3.7 Flash 10.0 10.0 100.0% 0 13.40s 42,656 0
Grok 4.20 8.2 7.9 83.3% 1 3.95s 287 8,312
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 3.6 4.6 25.0% 1 126.82s 164,069 0
Grok 4.20 4.1 1.8 50.0% 2 65.07s 265 40,877
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 10.0 10.0 100.0% 0 13.01s 8,802 0
Grok 4.20 10.0 10.0 100.0% 0 17.40s 232 9,556
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 10.0 10.0 100.0% 0 14.72s 23,113 0
Grok 4.20 10.0 10.0 100.0% 0 4.17s 180 5,333
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 4.1 4.4 44.5% 2 149.64s 410,502 0
Grok 4.20 5.3 10.0 33.3% 0 27.03s 375 49,339
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 5.5 10.0 0.0% 0 4.17s 2,862 0
Grok 4.20 3.9 2.6 33.3% 1 24.48s 65 6,440
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 9.8 10.0 100.0% 0 1.52s 2,010 0
Grok 4.20 9.8 10.0 100.0% 0 4.26s 57 6,419
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 5.3 7.2 44.4% 1 10.22s 25,422 0
Grok 4.20 7.7 10.0 66.7% 0 6.22s 149 7,913
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 10.0 10.0 100.0% 0 2.79s 1,172 0
Grok 4.20 3.0 10.0 0.0% 0 13.68s 197 6,620
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Step 3.7 Flash 3.0 10.0 0.0% 0 149.34s 147,476 0
Grok 4.20 3.0 10.0 0.0% 0 63.48s 9 16,442

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