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

Last updated at: 2026-05-29

Metric GPT-5.3 Chat GPT-5.3 Chat none Release: 2026-03-03 Step 3.7 Flash Step 3.7 Flash medium Release: 2026-05-29
Score 7.4 7.9
Rank #57 #32
Reliability 10.0 9.9
Consistency 8.4 9.2
Tests Correct
Attempt pass rate 68.3% 71.7%
Flaky tests 4 2
Total Runs 60 58
Cost per result 3.350 2.663
Total Cost $0.402 $0.347
Input Price $1.750 / 1M $0.200 / 1M
Output Price $14.000 / 1M $1.150 / 1M
Output Tokens 24,757 294,481
Reasoning Tokens 0 0
Response Time (avg) 6.13s 18.32s
Response Time (max) 18.33s 113.98s
Response Time (total) 122.61s 366.45s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 6.7 8.1 58.3% 1 3.86s 3,167 0
Step 3.7 Flash 8.7 7.9 91.7% 1 9.65s 32,185 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 6.9 6.2 66.7% 1 10.52s 4,772 0
Step 3.7 Flash 8.2 6.7 83.3% 1 10.64s 19,320 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 11.96s 2,614 0
Step 3.7 Flash 10.0 10.0 100.0% 0 9.06s 7,106 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 2.21s 942 0
Step 3.7 Flash 10.0 10.0 100.0% 0 2.75s 3,020 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 3.5 4.4 33.3% 2 13.01s 8,264 0
Step 3.7 Flash 7.7 10.0 66.7% 0 48.27s 70,347 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 4.6 10.0 0.0% 0 1.99s 319 0
Step 3.7 Flash 4.0 10.0 0.0% 0 6.85s 3,987 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 9.8 10.0 100.0% 0 3.51s 1,491 0
Step 3.7 Flash 9.8 10.0 100.0% 0 1.83s 2,166 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 2.99s 1,758 0
Step 3.7 Flash 5.7 9.9 33.3% 0 6.19s 15,071 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 8.36s 861 0
Step 3.7 Flash 10.0 10.0 100.0% 0 4.16s 2,115 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 3.0 10.0 0.0% 0 4.38s 569 0
Step 3.7 Flash 3.0 10.0 0.0% 0 113.98s 139,164 0

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