head-to-head

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

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-27.

	DeepSeek: DeepSeek Flash Latest	DeepSeek: DeepSeek V4.1 Flash
Vendor	~deepseek	deepseek
Quality Score	100	100
Benchmark Score	-	66.3
Input Price	$0.04/M	$0.04/M
Output Price	$0.29/M	$0.29/M
Context Window	1,048,576	1,048,576
Max Output	384,000	384,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	-	65.1

The verdict

For a sample job of 1 million input tokens and 250,000 output tokens, both cost $0.11 at current list prices.

Both read up to 1,048,576 tokens at once, roughly 1,573 pages of text.

Across the 18 tasks where they differ, DeepSeek V4.1 Flash on 18 (SQL Generation, Code Review, Code Completion and others).

Pick DeepSeek V4.1 Flash if you need the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.

Task	DeepSeek: DeepSeek Flash Latest	DeepSeek: DeepSeek V4.1 Flash
SQL Generation	134	141
Code Review	132	144
Code Completion	131	133
Code Refactoring	136	146
Bug Fixing	136	148
Unit Test Generation	124	131
Code Documentation	131	137
Regex Writing	119	126
CI/CD Pipelines	120	127
Frontend Component Design	122	129
Data Analysis	124	133
CSV / Spreadsheet Cleanup	134	136
ETL Scripting	128	137
OCR / Document Parsing	131	134
Table Extraction from PDFs	131	134
Long-Document Summarization	138	148
Short-Form Summarization	123	127
Blog Post Writing	122	129

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