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OpenAI: GPT-5 Nano vs StepFun: Step 3.5 Flash

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Last updated at : 2026-02-27 15:16

Summary

Metric OpenAI: GPT-5 Nano medium Release: Unknown release date StepFun: Step 3.5 Flash medium Release: Unknown release date Free Available
Rank #23 #11
Score 5.86 7.00
Consistency 6.60 8.32
Cost per result 0.519 0.000
Total Cost $0.037 $0.000
Tests Correct
Wrong Tests 7 5
Attempt pass rate 69.1% 73.8%
Flaky tests 6 3
Output Tokens 3,700 60,502
Reasoning Tokens 85,184 117,044

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5 Nano 7.00 9.99 66.7% 0 1,107 19,968
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 13,924 17,208
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5 Nano 5.50 5.81 83.3% 1 426 8,576
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 535 11,548
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5 Nano 4.00 4.41 55.6% 2 195 33,600
StepFun: Step 3.5 Flash 4.00 7.21 44.4% 1 40,942 74,237
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5 Nano 7.00 6.41 83.3% 1 360 4,032
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 2,121 3,274
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5 Nano 4.67 4.90 55.6% 2 1,054 12,032
StepFun: Step 3.5 Flash 2.00 4.96 33.3% 2 2,705 6,975
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5 Nano 10.00 10.00 100.0% 0 558 6,976
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 275 3,802

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