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DeepSeek: DeepSeek V4 Flash Vision Exp (batch) vs OpenAI: GPT-5.6 Luna (batch)

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

	DeepSeek: DeepSeek V4 Flash Vision Exp (batch)	OpenAI: GPT-5.6 Luna (batch)
Vendor	deepseek	openai
Quality Score	100	100
Benchmark Score	80.1	79.3
Input Price	$0.11/M	$0.10/M
Output Price	$0.33/M	$0.60/M
Context Window	1,048,576	1,050,000
Max Output	943,718	128,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	57.8	61.9
ai_index_agentic	79.4	70.4
ai_index_coding	100.0	100.0

Who wins by task?

Task	DeepSeek: DeepSeek V4 Flash Vision Exp (batch)	OpenAI: GPT-5.6 Luna (batch)
SQL Generation	169	168
Code Review	161	161
Bug Fixing	175	174
Unit Test Generation	151	151
Regex Writing	134	134
CI/CD Pipelines	141	141
Frontend Component Design	143	143
Data Analysis	167	165
CSV / Spreadsheet Cleanup	153	153
ETL Scripting	150	150
JSON Extraction	149	149
Bulk Data Labeling	135	135
Long-Document Summarization	156	156
Short-Form Summarization	131	131
Blog Post Writing	137	137

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

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