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StepFun: Step 3.7 Flash vs xAI: Grok 4.20

Step 3.7 Flash (low) leads on average score with 7.3 vs 7.1. Step 3.7 Flash (low) has the lower benchmark cost at $0.454 vs $0.777. Step 3.7 Flash (low) is faster at 20.68s vs 29.47s, with pass rates of 68.2% vs 63.6%.

Recommended modelStep 3.7 Flash (low)It has the best score here (7.3), while costing about 1.7x less than Grok 4.20 (medium).

Last updated at: 2026-07-25

Metric Step 3.7 Flash Step 3.7 Flash low Release: 2026-05-29 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.3 7.1
Rank #75 #83
Reliability 10.0 10.0
Consistency 8.1 8.5
Tests Correct
Attempt pass rate 68.2% 63.6%
Flaky tests 5 4
Total Runs 66 66
Cost per result 3.782 9.709
Total Cost $0.454 $0.777
Input Price $0.200 / 1M $1.250 / 1M
Output Price $1.150 / 1M $2.500 / 1M
Total Input Tokens 103,833 102,791
Output Tokens 376,581 5,363
Reasoning Tokens 0 253,977
Response Time (avg) 20.68s 29.47s
Response Time (max) 124.75s 199.66s
Response Time (total) 455.01s 648.35s

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#75 Step 3.7 Flash

low
Invalid SVG
Cost
$0.004
Time
25.3s
Tokens
3,072 tok

#83 xAI: Grok 4.20

medium
Cost
$0.041
Time
110.3s
Tokens
16,336 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 8.2 7.2 88.9% 1 9.46s 7,437 18,685 0
Grok 4.20 6.3 6.6 55.6% 1 109.93s 8,307 268 103,150

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