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GPT-5.4 vs Step 3.5 Flash (medium)

Step 3.5 Flash (medium) leads on average score with 5.9 vs 5.8. Step 3.5 Flash (medium) has the lower benchmark cost at $0.132 vs $0.397. GPT-5.4 is faster at 2.08s vs 191.63s, with pass rates of 34.9% vs 50.0%.

Last updated at: 2026-09-02

Rank
#209
Total Output Tokens
8,339
Response Time (avg)
2.08s
Total Cost
$0.397
Rank
#202
Total Output Tokens
568,536
Response Time (avg)
191.63s
Total Cost
$0.132
Recommended model GPT-5.4

Its score stays close to the best score here (5.8 vs 5.9), while responding about 92.2x faster than Step 3.5 Flash (medium).

Detailed comparison

Metric GPT-5.4 GPT-5.4 none Release: 2026-03-05 Step 3.5 Flash Step 3.5 Flash medium Release: 2026-02-01
Score 5.8 5.9
Rank #209 #202
Reliability 10.0 10.0
Consistency 9.2 8.6
Attempts 66/66 63/66
Tests Correct
Attempt pass rate 34.9% 50.0%
Flaky tests 2 2
Total Runs 66 63
Cost per result 5.667 0.858
Total Cost $0.397 $0.132
Input Price $2.500 / 1M $0.100 / 1M
Output Price $15.000 / 1M $0.300 / 1M
Total Input Tokens 108,641 65,716
Output Tokens 8,339 189,424
Reasoning Tokens 0 379,112
Response Time (avg) 2.08s 191.63s
Response Time (max) 15.63s 1597.85s
Response Time (total) 45.75s 3066.07s
Parameters ~1.5T total (~100B 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.

#209 GPT-5.4

none
Cost
$0.026
Time
18.1s
Tokens
1,792 tok

#202 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 5.5 10.0 33.3% 0 1.62s 7,305 516 0
Step 3.5 Flash 2.4 5.2 0.0% 0 258.38s 2,211 13,207 22,429

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