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StepFun: Step 3.7 Flash vs OpenAI: GPT-5.5 (batch)

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-07-30.

StepFun: Step 3.7 Flash OpenAI: GPT-5.5 (batch)
Vendorstepfunopenai
Quality Score100100
Benchmark Score50.392.6
Input Price$0.20/M$2.50/M
Output Price$1.15/M$15.00/M
Context Window262,1441,050,000
Max Output256,000128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index49.990.5
ai_index_agentic35.574.0
ai_index_coding65.3100.0
eqbench-82.4

Who wins by task?

TaskStepFun: Step 3.7 FlashOpenAI: GPT-5.5 (batch)
SQL Generation 153 176
Code Review 146 177
Code Completion 130 120
Code Refactoring 144 175
Bug Fixing 155 190
Unit Test Generation 139 160
Code Documentation 133 147
Regex Writing 129 137
CI/CD Pipelines 131 150
Frontend Component Design 136 150
Data Analysis 150 175
CSV / Spreadsheet Cleanup 141 158
ETL Scripting 137 163
JSON Extraction 142 137
Bulk Data Labeling 133 122
OCR / Document Parsing 138 149
Table Extraction from PDFs 138 149
Long-Document Summarization 142 169
Short-Form Summarization 128 122
Blog Post Writing 129 145

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

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