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OpenAI: GPT-5.5 vs StepFun: Step 3.7 Flash

The average score is effectively tied at 6.9 vs 6.9. GPT-5.5 has the lower benchmark cost at $0.544 vs $1.207. GPT-5.5 is faster at 2.36s vs 64.68s, with pass rates of 56.1% vs 63.6%.

Recommended modelGPT-5.5It has the best score here (6.9), while costing about 2.2x less than Step 3.7 Flash (high).

Last updated at: 2026-07-24

Metric GPT-5.5 GPT-5.5 none Release: 2026-04-24 Step 3.7 Flash Step 3.7 Flash high Release: 2026-05-29
Score 6.9 6.9
Rank #91 #90
Reliability 10.0 10.0
Consistency 8.9 8.0
Tests Correct
Attempt pass rate 56.1% 63.6%
Flaky tests 3 5
Total Runs 66 66
Cost per result 4.945 10.973
Total Cost $0.544 $1.207
Input Price $5.000 / 1M $0.200 / 1M
Output Price $30.000 / 1M $1.150 / 1M
Total Input Tokens 79,285 98,691
Output Tokens 4,915 1,032,395
Reasoning Tokens 0 0
Response Time (avg) 2.36s 64.68s
Response Time (max) 12.24s 364.99s
Response Time (total) 51.88s 1423.01s

Hamster playing table tennis

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

#91 GPT-5.5

none
Cost
$0.090
Time
54.3s
Tokens
3,063 tok

#90 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

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 5.5 10.0 33.3% 0 1.35s 7,305 462 0
Step 3.7 Flash 4.0 6.0 22.2% 1 206.21s 6,057 327,340 0

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