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GPT-5.4 Mini vs Step 3.5 Flash (medium)

Step 3.5 Flash (medium) leads on average score with 5.9 vs 5.9. GPT-5.4 Mini has the lower benchmark cost at $0.095 vs $0.132. GPT-5.4 Mini is faster at 1.58s vs 191.63s, with pass rates of 31.8% vs 50.0%.

Last updated at: 2026-08-29

Rank
#196
Total Output Tokens
7,898
Response Time (avg)
1.58s
Total Cost
$0.095
Rank
#191
Total Output Tokens
568,536
Response Time (avg)
191.63s
Total Cost
$0.132
Recommended model GPT-5.4 Mini

Its score stays close to the best score here (5.9 vs 5.9), while responding about 120.9x faster than Step 3.5 Flash (medium).

Detailed comparison

Metric GPT-5.4 Mini GPT-5.4 Mini none Release: 2026-03-17 Step 3.5 Flash Step 3.5 Flash medium Release: 2026-02-01
Score 5.9 5.9
Rank #196 #191
Reliability 10.0 10.0
Consistency 9.3 8.6
Attempts 66/66 63/66
Tests Correct
Attempt pass rate 31.8% 50.0%
Flaky tests 2 2
Total Runs 66 63
Cost per result 1.581 0.858
Total Cost $0.095 $0.132
Input Price $0.750 / 1M $0.100 / 1M
Output Price $4.500 / 1M $0.300 / 1M
Total Input Tokens 79,076 65,716
Output Tokens 7,898 189,424
Reasoning Tokens 0 379,112
Response Time (avg) 1.58s 191.63s
Response Time (max) 9.92s 1597.85s
Response Time (total) 34.86s 3066.07s
Parameters ~400B total (~17B active) 196B total (11B active)
Availability Closed Open source

Model generation showcase

Hamster playing table tennis

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

#196 GPT-5.4 Mini

none
Cost
$0.010
Time
11.7s
Tokens
2,151 tok

#191 Step 3.5 Flash

medium
Cost
$0.008
Time
277.1s
Tokens
23,695 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
GPT-5.4 Mini 5.5 10.0 33.3% 0 913ms 7,305 401 0
Step 3.5 Flash 2.4 5.2 0.0% 0 258.38s 2,211 13,207 22,429

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