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StepFun: Step 3.7 Flash vs xAI: Grok 4.5

Summary

Step 3.7 Flash (medium) vs Grok 4.5 (low) benchmark comparison: Step 3.7 Flash (medium) leads on average score with 8.5 vs 7.8. Step 3.7 Flash (medium) has the lower benchmark cost at $0.376 vs $0.760. Grok 4.5 (low) is faster at 15.48s vs 20.35s, with pass rates of 73.0% vs 74.6%.

Recommended model: Step 3.7 Flash (medium) - It has the best score here (8.5), while costing about 2.0x less than Grok 4.5 (low).

Last updated at: 2026-07-08

Metric Step 3.7 Flash Step 3.7 Flash medium Release: 2026-05-29 Grok 4.5 Grok 4.5 low Release: 2026-07-08
Score 8.5 7.8
Rank #20 #34
Reliability 9.9 10.0
Consistency 9.3 9.7
Tests Correct
Attempt pass rate 73.0% 74.6%
Flaky tests 2 1
Total Runs 61 63
Cost per result 2.686 5.061
Total Cost $0.376 $0.760
Input Price $0.200 / 1M $2.000 / 1M
Output Price $1.150 / 1M $6.000 / 1M
Total Input Tokens 39,981 58,652
Output Tokens 319,958 1,735
Reasoning Tokens 0 105,233
Response Time (avg) 20.35s 15.48s
Response Time (max) 113.98s 205.28s
Response Time (total) 427.42s 324.98s

Generation showcase

Hamster playing table tennis

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

#20 Step 3.7 Flash

medium
Cost
$0.006
Time
46.2s
Tokens
4,466 tok

#34 xAI: Grok 4.5

low
Cost
$0.011
Time
12.4s
Tokens
2,018 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 8.7 7.9 91.7% 1 9.65s 756 32,185 0
Grok 4.5 10.0 10.0 100.0% 0 2.75s 2,991 261 3,000
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 8.8 7.8 88.9% 1 27.42s 7,437 44,797 0
Grok 4.5 10.0 10.0 100.0% 0 13.72s 9,579 303 15,641
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 10.0 10.0 100.0% 0 9.06s 13,683 7,106 0
Grok 4.5 3.0 10.0 0.0% 0 8.16s 15,084 261 2,370
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 10.0 10.0 100.0% 0 2.75s 7,398 3,020 0
Grok 4.5 10.0 10.0 100.0% 0 3.44s 8,937 225 2,549
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 7.7 10.0 66.7% 0 48.27s 708 70,347 0
Grok 4.5 3.0 10.0 0.0% 0 72.64s 2,514 14 70,275
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 4.0 10.0 0.0% 0 6.85s 525 3,987 0
Grok 4.5 6.1 3.1 66.7% 1 4.88s 1,077 98 1,253
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 9.8 10.0 100.0% 0 1.83s 735 2,166 0
Grok 4.5 9.8 10.0 100.0% 0 2.80s 1,857 57 1,878
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 5.7 9.9 33.3% 0 6.19s 756 15,071 0
Grok 4.5 10.0 10.0 100.0% 0 3.20s 2,430 217 2,590
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 10.0 10.0 100.0% 0 4.16s 7,746 2,115 0
Grok 4.5 10.0 10.0 100.0% 0 5.83s 13,394 284 871
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Step 3.7 Flash 3.0 10.0 0.0% 0 113.98s 237 139,164 0
Grok 4.5 3.0 10.0 0.0% 0 13.98s 789 15 4,806

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