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StepFun: Step 3.7 Flash vs xAI: Grok 4.3

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

StepFun: Step 3.7 Flash xAI: Grok 4.3
Vendorstepfunx-ai
Quality Score100100
Benchmark Score74.484.8
Input Price$0.20/M$1.25/M
Output Price$1.15/M$2.50/M
Context Window256,0001,000,000
Max Output256,000-
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index70.387.8
ai_index_agentic98.2100.0
ai_index_coding61.267.7

Who wins by task?

TaskStepFun: Step 3.7 FlashxAI: Grok 4.3
SQL Generation 163 169
Code Review 156 166
Code Completion 130 121
Code Refactoring 151 163
Bug Fixing 171 181
Unit Test Generation 146 152
Code Documentation 136 143
Regex Writing 135 136
CI/CD Pipelines 137 143
Frontend Component Design 142 145
Data Analysis 166 170
CSV / Spreadsheet Cleanup 143 150
ETL Scripting 144 153
JSON Extraction 143 136
Bulk Data Labeling 133 125
OCR / Document Parsing 139 144
Table Extraction from PDFs 139 144
Long-Document Summarization 148 160
Short-Form Summarization 131 124
Blog Post Writing 135 140

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

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