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DeepSeek: DeepSeek V4.1 Flash vs Anthropic: Claude Opus 5 (batch)

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.

DeepSeek: DeepSeek V4.1 Flash Anthropic: Claude Opus 5 (batch)
Vendordeepseekanthropic
Quality Score100100
Benchmark Score66.387.3
Input Price$0.15/M$2.50/M
Output Price$0.60/M$12.50/M
Context Window1,048,5761,000,000
Max Output384,000128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index65.183.8

Who wins by task?

TaskDeepSeek: DeepSeek V4.1 FlashAnthropic: Claude Opus 5 (batch)
SQL Generation 141 142
Code Review 144 147
Code Completion 133 118
Code Refactoring 146 149
Bug Fixing 148 151
Unit Test Generation 131 134
Code Documentation 137 136
Regex Writing 126 125
CI/CD Pipelines 127 130
Frontend Component Design 129 132
Data Analysis 133 136
CSV / Spreadsheet Cleanup 136 135
ETL Scripting 137 139
JSON Extraction 131 121
Bulk Data Labeling 129 117
OCR / Document Parsing 134 135
Table Extraction from PDFs 134 135
Long-Document Summarization 148 149
Short-Form Summarization 127 117
Blog Post Writing 129 130

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

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