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OpenAI: GPT-5.3 Chat vs StepFun: Step 3.7 Flash

GPT-5.3 Chat leads on average score with 7.5 vs 7.3. Step 3.7 Flash (low) has the lower benchmark cost at $0.454 vs $0.571. GPT-5.3 Chat is faster at 6.88s vs 20.68s, with pass rates of 68.2% vs 68.2%.

Recommended modelGPT-5.3 ChatIt has the best score here (7.5), while responding about 3.0x faster than Step 3.7 Flash (low).

Last updated at: 2026-07-25

Metric GPT-5.3 Chat GPT-5.3 Chat none Release: 2026-03-03 Step 3.7 Flash Step 3.7 Flash low Release: 2026-05-29
Score 7.5 7.3
Rank #62 #75
Reliability 10.0 10.0
Consistency 8.2 8.1
Tests Correct
Attempt pass rate 68.2% 68.2%
Flaky tests 5 5
Total Runs 66 66
Cost per result 4.387 3.782
Total Cost $0.571 $0.454
Input Price $1.750 / 1M $0.200 / 1M
Output Price $14.000 / 1M $1.150 / 1M
Total Input Tokens 78,990 103,833
Output Tokens 30,854 376,581
Reasoning Tokens 0 0
Response Time (avg) 6.88s 20.68s
Response Time (max) 18.33s 124.75s
Response Time (total) 151.31s 455.01s

Hamster playing table tennis

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

#62 GPT-5.3 Chat

none
Cost
$0.008
Time
8.1s
Tokens
634 tok

#75 Step 3.7 Flash

low
Invalid SVG
Cost
$0.004
Time
25.3s
Tokens
3,072 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-5.3 Chat 5.6 4.7 55.6% 2 10.52s 7,302 6,632 0
Step 3.7 Flash 8.2 7.2 88.9% 1 9.46s 7,437 18,685 0

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