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StepFun: Step 3.7 Flash vs xAI: Grok 4.5

Summary

Step 3.7 Flash (low) vs Grok 4.5 (medium) benchmark comparison: Grok 4.5 (medium) leads on average score with 8.3 vs 7.7. Step 3.7 Flash (low) has the lower benchmark cost at $0.341 vs $1.696. Step 3.7 Flash (low) is faster at 15.74s vs 62.63s, with pass rates of 68.3% vs 77.8%.

Recommended model: Step 3.7 Flash (low) - Its score stays close to the best score here (7.7 vs 8.3), while costing about 5.0x less than Grok 4.5 (medium).

Last updated at: 2026-07-08

Metric Step 3.7 Flash Step 3.7 Flash low Release: 2026-05-29 Grok 4.5 Grok 4.5 medium Release: 2026-07-08
Score 7.7 8.3
Rank #43 #23
Reliability 10.0 9.9
Consistency 8.4 8.9
Tests Correct
Attempt pass rate 68.3% 77.8%
Flaky tests 4 3
Total Runs 63 63
Cost per result 2.840 11.304
Total Cost $0.341 $1.696
Input Price $0.200 / 1M $2.000 / 1M
Output Price $1.150 / 1M $6.000 / 1M
Total Input Tokens 40,101 53,500
Output Tokens 289,325 1,621
Reasoning Tokens 0 263,127
Response Time (avg) 15.74s 62.63s
Response Time (max) 124.75s 436.38s
Response Time (total) 330.63s 1315.20s

Generation showcase

Hamster playing table tennis

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

#43 Step 3.7 Flash

low
Invalid SVG
Cost
$0.004
Time
25.3s
Tokens
3,072 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 4.02s 756 10,896 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 8.2 7.2 88.9% 1 9.46s 7,437 18,685 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 7.98s 13,683 6,426 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 7.3 5.8 83.3% 1 2.29s 7,398 2,667 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 5.3 7.2 44.4% 1 43.31s 828 104,487 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 3.4 9.3 0.0% 0 7.00s 525 4,604 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 1.58s 735 1,857 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 5.5 9.9 33.3% 0 1.84s 756 3,564 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 3.25s 7,746 1,360 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% 0 124.75s 237 134,779 0
Grok 4.5 3.0 10.0 0.0% 0 74.44s 789 13 14,921

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