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StepFun: Step 3.7 Flash vs xAI: Grok 4.5

Summary

Step 3.7 Flash (medium) vs Grok 4.5 (medium) benchmark comparison: Step 3.7 Flash (medium) leads on average score with 8.5 vs 8.3. Step 3.7 Flash (medium) has the lower benchmark cost at $0.376 vs $1.696. Step 3.7 Flash (medium) is faster at 20.35s vs 62.63s, with pass rates of 73.0% vs 77.8%.

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

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 medium Release: 2026-07-08
Score 8.5 8.3
Rank #20 #23
Reliability 9.9 9.9
Consistency 9.3 8.9
Tests Correct
Attempt pass rate 73.0% 77.8%
Flaky tests 2 3
Total Runs 61 63
Cost per result 2.686 11.304
Total Cost $0.376 $1.696
Input Price $0.200 / 1M $2.000 / 1M
Output Price $1.150 / 1M $6.000 / 1M
Total Input Tokens 39,981 53,500
Output Tokens 319,958 1,621
Reasoning Tokens 0 263,127
Response Time (avg) 20.35s 62.63s
Response Time (max) 113.98s 436.38s
Response Time (total) 427.42s 1315.20s

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

#23 xAI: Grok 4.5

medium
Cost
$0.044
Time
59.4s
Tokens
7,512 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 23.50s 2,991 147 4,018
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 7.6 7.2 77.8% 1 155.69s 9,579 390 104,634
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 10.0 10.0 100.0% 0 15.65s 15,084 261 4,254
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 6.29s 8,937 225 3,657
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 2.9 7.2 11.1% 1 198.89s 2,212 11 121,922
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 6.5 3.4 66.7% 1 12.84s 1,077 71 2,384
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 6.06s 1,857 57 2,728
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 7.75s 2,430 254 3,641
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 6.57s 8,544 192 968
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 74.44s 789 13 14,921

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