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OpenAI: GPT-5.4 Mini vs StepFun: Step 3.7 Flash

Summary

GPT-5.4 Mini vs Step 3.7 Flash benchmark comparison: GPT-5.4 Mini leads on average score with 8.0 vs 7.1. GPT-5.4 Mini has the lower benchmark cost at $0.526 vs $1.148. GPT-5.4 Mini is faster at 22.34s vs 64.46s, with pass rates of 73.0% vs 63.5%.

Recommended model: GPT-5.4 Mini - It has the best score here (8.0), while costing about 2.2x less than Step 3.7 Flash.

Last updated at: 2026-06-12

Metric GPT-5.4 Mini GPT-5.4 Mini medium Release: 2026-03-17 Step 3.7 Flash Step 3.7 Flash high Release: 2026-05-29
Score 8.0 7.1
Rank #30 #63
Reliability 10.0 10.0
Consistency 8.0 8.2
Tests Correct
Attempt pass rate 73.0% 63.5%
Flaky tests 5 4
Total Runs 63 63
Cost per result 4.381 10.434
Total Cost $0.526 $1.148
Input Price $0.750 / 1M $0.200 / 1M
Output Price $4.500 / 1M $1.150 / 1M
Total Input Tokens 34,116 38,391
Output Tokens 2,181 991,355
Reasoning Tokens 108,937 0
Response Time (avg) 22.34s 64.46s
Response Time (max) 138.75s 364.99s
Response Time (total) 469.20s 1353.57s

Generation showcase

Hamster playing table tennis

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

#30 GPT-5.4 Mini

medium
Cost
$0.056
Time
95.5s
Tokens
12,464 tok

#63 Step 3.7 Flash

high
Cost
$0.007
Time
63.6s
Tokens
6,030 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
GPT-5.4 Mini 8.6 7.9 91.7% 1 4.05s 606 296 2,876
Step 3.7 Flash 10.0 10.0 100.0% 0 13.40s 696 42,656 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 8.4 7.4 88.9% 1 57.87s 7,305 467 40,902
Step 3.7 Flash 4.0 6.0 22.2% 1 206.21s 6,057 327,340 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 10.0 10.0 100.0% 0 17.81s 11,019 317 4,317
Step 3.7 Flash 10.0 10.0 100.0% 0 13.01s 13,638 8,802 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 10.0 10.0 100.0% 0 2.43s 7,140 234 650
Step 3.7 Flash 10.0 10.0 100.0% 0 14.72s 7,368 23,113 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 4.1 4.4 44.5% 2 65.31s 619 60 43,286
Step 3.7 Flash 4.1 4.4 44.5% 2 149.64s 783 410,502 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 4.5 10.0 0.0% 0 3.72s 477 150 510
Step 3.7 Flash 5.5 10.0 0.0% 0 4.17s 510 2,862 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 9.8 10.0 100.0% 0 2.13s 660 96 1,185
Step 3.7 Flash 9.8 10.0 100.0% 0 1.52s 705 2,010 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 7.8 10.0 66.7% 0 4.37s 642 278 2,443
Step 3.7 Flash 5.3 7.2 44.4% 1 10.22s 711 25,422 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 4.7 1.6 66.7% 1 9.62s 5,453 251 2,594
Step 3.7 Flash 10.0 10.0 100.0% 0 2.79s 7,701 1,172 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 Mini 3.0 10.0 0.0% 0 30.10s 195 32 10,174
Step 3.7 Flash 3.0 10.0 0.0% 0 149.34s 222 147,476 0

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