head-to-head

DeepSeek: DeepSeek V4 Flash Vision Exp (batch) vs ByteDance Seed: Seed 2.1 Turbo

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

	DeepSeek: DeepSeek V4 Flash Vision Exp (batch)	ByteDance Seed: Seed 2.1 Turbo
Vendor	deepseek	bytedance-seed
Quality Score	100	100
Benchmark Score	80.1	-
Input Price	$0.11/M	$0.50/M
Output Price	$0.33/M	$2.50/M
Context Window	1,048,576	262,144
Max Output	943,718	235,929
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	57.8	-
ai_index_agentic	79.4	-
ai_index_coding	100.0	-

Who wins by task?

Task	DeepSeek: DeepSeek V4 Flash Vision Exp (batch)	ByteDance Seed: Seed 2.1 Turbo
SQL Generation	169	130
Code Review	161	126
Code Completion	133	128
Code Refactoring	159	127
Bug Fixing	175	130
Unit Test Generation	151	121
Code Documentation	141	125
Regex Writing	134	119
CI/CD Pipelines	141	117
Frontend Component Design	143	122
Data Analysis	167	124
CSV / Spreadsheet Cleanup	153	128
ETL Scripting	150	122
JSON Extraction	149	131
Bulk Data Labeling	135	129
OCR / Document Parsing	145	128
Table Extraction from PDFs	145	128
Long-Document Summarization	156	129
Short-Form Summarization	131	123
Blog Post Writing	137	118

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