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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 2026-06-23.

StepFun: Step 3.7 Flash xAI: Grok 4.3
Vendorstepfunx-ai
Quality Score100100
Benchmark Score48.057.7
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_index49.162.0
ai_index_agentic35.539.8
ai_index_coding61.669.7

Who wins by task?

TaskStepFun: Step 3.7 FlashxAI: Grok 4.3
SQL Generation 152 158
Code Review 145 155
Code Completion 129 120
Code Refactoring 143 155
Bug Fixing 154 164
Unit Test Generation 138 144
Code Documentation 132 139
Regex Writing 129 130
CI/CD Pipelines 131 136
Frontend Component Design 135 138
Data Analysis 149 153
CSV / Spreadsheet Cleanup 140 147
ETL Scripting 137 145
JSON Extraction 142 134
Bulk Data Labeling 133 124
OCR / Document Parsing 137 141
Table Extraction from PDFs 137 141
Long-Document Summarization 141 152
Short-Form Summarization 128 120
Blog Post Writing 129 134

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

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