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StepFun: Step 3.7 Flash vs OpenAI: GPT-5.4 Mini

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-06-12.

StepFun: Step 3.7 Flash OpenAI: GPT-5.4 Mini
Vendorstepfunopenai
Quality Score100100
Benchmark Score74.485.9
Input Price$0.20/M$0.75/M
Output Price$1.15/M$4.50/M
Context Window256,000400,000
Max Output256,000128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index70.380.7
ai_index_agentic98.297.1
ai_index_coding61.284.9

Who wins by task?

TaskStepFun: Step 3.7 FlashOpenAI: GPT-5.4 Mini
SQL Generation 163 171
Code Review 156 166
Code Completion 130 132
Code Refactoring 151 163
Bug Fixing 171 181
Unit Test Generation 146 153
Code Documentation 136 142
Regex Writing 135 136
CI/CD Pipelines 137 144
Frontend Component Design 142 146
Data Analysis 166 171
CSV / Spreadsheet Cleanup 143 152
ETL Scripting 144 153
JSON Extraction 143 146
OCR / Document Parsing 139 145
Table Extraction from PDFs 139 145
Long-Document Summarization 148 159
Short-Form Summarization 131 131
Blog Post Writing 135 140

Scores reflect capability match + benchmark data + pricing for each task. Methodology →

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