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StepFun: Step 3.7 Flash vs Anthropic: Claude Opus 4.8 (batch)

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-13.

StepFun: Step 3.7 Flash Anthropic: Claude Opus 4.8 (batch)
Vendorstepfunanthropic
Quality Score100100
Benchmark Score50.194.7
Input Price$0.20/M$2.50/M
Output Price$1.15/M$12.50/M
Context Window262,1441,000,000
Max Output256,000128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index51.094.6
ai_index_agentic35.981.5
ai_index_coding65.3100.0
eqbench-83.3

Who wins by task?

TaskStepFun: Step 3.7 FlashAnthropic: Claude Opus 4.8 (batch)
SQL Generation 153 178
Code Review 146 179
Code Completion 130 121
Code Refactoring 144 176
Bug Fixing 155 193
Unit Test Generation 139 161
Code Documentation 133 148
Regex Writing 129 138
CI/CD Pipelines 131 151
Frontend Component Design 136 151
Data Analysis 150 178
CSV / Spreadsheet Cleanup 141 158
ETL Scripting 138 164
JSON Extraction 142 138
Bulk Data Labeling 133 123
OCR / Document Parsing 138 149
Table Extraction from PDFs 138 149
Long-Document Summarization 142 171
Short-Form Summarization 128 123
Blog Post Writing 130 146

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

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