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StepFun: Step 3.7 Flash vs OpenAI: GPT-5.4

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-06-22.

StepFun: Step 3.7 Flash OpenAI: GPT-5.4
Vendorstepfunopenai
Quality Score100100
Benchmark Score48.090.4
Input Price$0.20/M$2.50/M
Output Price$1.15/M$15.00/M
Context Window256,0001,050,000
Max Output256,000128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index49.184.8
ai_index_agentic35.567.8
ai_index_coding61.6100.0
eqbench-82.4

Who wins by task?

TaskStepFun: Step 3.7 FlashOpenAI: GPT-5.4
SQL Generation 152 174
Code Review 145 175
Code Completion 129 120
Code Refactoring 143 174
Bug Fixing 154 188
Unit Test Generation 138 159
Code Documentation 132 146
Regex Writing 129 136
CI/CD Pipelines 131 149
Frontend Component Design 135 149
Data Analysis 149 173
CSV / Spreadsheet Cleanup 140 157
ETL Scripting 137 161
JSON Extraction 142 137
Bulk Data Labeling 133 122
OCR / Document Parsing 137 149
Table Extraction from PDFs 137 149
Long-Document Summarization 141 168
Short-Form Summarization 128 122
Blog Post Writing 129 144

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

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