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Z.ai: GLM 5.3 Flash vs DeepSeek: DeepSeek V4 Flash Vision Exp (batch)

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

	Z.ai: GLM 5.3 Flash	DeepSeek: DeepSeek V4 Flash Vision Exp (batch)
Vendor	z-ai	deepseek
Quality Score	100	100
Benchmark Score	87.2	80.1
Input Price	$0.07/M	$0.11/M
Output Price	$0.25/M	$0.33/M
Context Window	1,310,720	1,048,576
Max Output	131,072	943,718
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	69.1	57.8
ai_index_agentic	84.5	79.4
ai_index_coding	100.0	100.0

Who wins by task?

Task	Z.ai: GLM 5.3 Flash	DeepSeek: DeepSeek V4 Flash Vision Exp (batch)
SQL Generation	171	169
Code Review	164	161
Code Completion	133	133
Code Refactoring	162	159
Bug Fixing	178	175
Unit Test Generation	153	151
Code Documentation	142	141
Regex Writing	135	134
CI/CD Pipelines	143	141
Frontend Component Design	145	143
Data Analysis	170	167
CSV / Spreadsheet Cleanup	154	153
ETL Scripting	152	150
JSON Extraction	149	149
OCR / Document Parsing	146	145
Table Extraction from PDFs	146	145
Long-Document Summarization	158	156
Short-Form Summarization	131	131
Blog Post Writing	139	137

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

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