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OpenAI: GPT-5.3 Chat vs StepFun: Step 3.5 Flash

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Last updated at: 2026-03-06

Metric OpenAI: GPT-5.3 Chat none Release: 2026-03-03 StepFun: Step 3.5 Flash medium Release: 2026-02-01 Free Available
Rank #19 #13
Avg Score 7.3 7.4
Consistency 8.5 9.1
Cost per result 3.163 0.000
Total Cost $0.317 $0.000
Tests Correct
Attempt pass rate 70.8% 68.8%
Flaky tests 3 2
Total Runs 48 (16 x 3) 48 (16 x 3)
Output Tokens 19,272 71,452
Reasoning Tokens 0 155,147
Response Time (avg) 5.96s 29.10s
Response Time (max) 18.33s 170.45s
Response Time (total) 95.30s 290.96s

Top Models by Score

Score vs Total Cost

Response Time (avg)

Avg Score vs Response Time (avg)

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
OpenAI: GPT-5.3 Chat 7.3 7.5 77.8% 1 4.72s 3,091 0
StepFun: Step 3.5 Flash 10.0 10.0 100.0% 0 18.54s 13,924 17,208
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
OpenAI: GPT-5.3 Chat 10.0 10.0 100.0% 0 11.96s 2,614 0
StepFun: Step 3.5 Flash 10.0 10.0 100.0% 0 29.57s 1,176 12,984
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
OpenAI: GPT-5.3 Chat 9.9 10.0 100.0% 0 2.21s 942 0
StepFun: Step 3.5 Flash 10.0 10.0 100.0% 0 15.01s 600 13,886
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
OpenAI: GPT-5.3 Chat 10.0 4.4 33.3% 2 13.01s 8,264 0
StepFun: Step 3.5 Flash 4.0 7.2 44.4% 1 170.45s 45,350 90,436
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
OpenAI: GPT-5.3 Chat 4.0 10.0 0.0% 0 1.99s 319 0
StepFun: Step 3.5 Flash 6.0 10.0 0.0% 0 6.54s 2,214 2,584
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
OpenAI: GPT-5.3 Chat 9.0 10.0 50.0% 0 3.29s 1,455 0
StepFun: Step 3.5 Flash 9.0 6.8 83.3% 1 4.98s 2,284 3,412
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
OpenAI: GPT-5.3 Chat 10.0 10.0 100.0% 0 2.93s 1,726 0
StepFun: Step 3.5 Flash 4.0 10.0 33.3% 0 7.72s 5,629 10,835
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
OpenAI: GPT-5.3 Chat 10.0 10.0 100.0% 0 8.36s 861 0
StepFun: Step 3.5 Flash 10.0 10.0 100.0% 0 11.91s 275 3,802

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