head-to-head

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

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-04.

	Z.ai: GLM 5.3 Flash (batch)	DeepSeek: DeepSeek V4 Flash Vision Exp
Vendor	z-ai	deepseek
Quality Score	100	100
Benchmark Score	96.7	90.0
Input Price	$0.15/M	$0.22/M
Output Price	$0.50/M	$0.66/M
Context Window	1,048,575	1,048,576
Max Output	943,717	384,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	94.8	84.9
ai_index_agentic	96.0	87.2
ai_index_coding	100.0	100.0

Who wins by task?

Task	Z.ai: GLM 5.3 Flash (batch)	DeepSeek: DeepSeek V4 Flash Vision Exp
SQL Generation	175	173
Code Review	170	167
Code Completion	133	133
Code Refactoring	166	164
Bug Fixing	186	182
Unit Test Generation	157	155
Code Documentation	145	144
Regex Writing	139	137
CI/CD Pipelines	147	145
Frontend Component Design	149	147
Data Analysis	176	172
CSV / Spreadsheet Cleanup	155	154
ETL Scripting	157	155
JSON Extraction	149	149
Bulk Data Labeling	135	135
OCR / Document Parsing	147	147
Table Extraction from PDFs	147	147
Long-Document Summarization	162	160
Short-Form Summarization	133	132
Blog Post Writing	143	141

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