head-to-head

DeepSeek: DeepSeek V4.1 Flash vs DeepSeek: DeepSeek V4 Flash Latest

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

	DeepSeek: DeepSeek V4.1 Flash	DeepSeek: DeepSeek V4 Flash Latest
Vendor	deepseek	~deepseek
Quality Score	100	99
Benchmark Score	66.3	-
Input Price	$0.15/M	$0.03/M
Output Price	$0.60/M	$0.80/M
Context Window	1,048,576	1,310,720
Max Output	384,000	943,718
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	-
Audio	-	-
Benchmark Scores
ai_index	65.1	-

Who wins by task?

Task	DeepSeek: DeepSeek V4.1 Flash	DeepSeek: DeepSeek V4 Flash Latest
SQL Generation	141	133
Code Review	144	131
Code Completion	133	131
Code Refactoring	146	135
Bug Fixing	148	135
Unit Test Generation	131	123
Code Documentation	137	131
Regex Writing	126	119
CI/CD Pipelines	127	119
Frontend Component Design	129	91
Data Analysis	133	123
CSV / Spreadsheet Cleanup	136	133
ETL Scripting	137	127
JSON Extraction	131	131
Bulk Data Labeling	129	129
OCR / Document Parsing	134	85
Table Extraction from PDFs	134	85
Long-Document Summarization	148	137
Short-Form Summarization	127	123
Blog Post Writing	129	121

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