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Z.ai: GLM 5.3 Flash vs MoonshotAI: Kimi K3 (batch)

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

	Z.ai: GLM 5.3 Flash	MoonshotAI: Kimi K3 (batch)
Vendor	z-ai	moonshotai
Quality Score	100	100
Benchmark Score	96.7	96.2
Input Price	$0.07/M	$3.00/M
Output Price	$0.25/M	$15.00/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	94.8	98.5
ai_index_agentic	96.0	89.5
ai_index_coding	100.0	100.0

Who wins by task?

Task	Z.ai: GLM 5.3 Flash	MoonshotAI: Kimi K3 (batch)
SQL Generation	175	173
Code Review	170	170
Code Completion	133	118
Code Refactoring	166	167
Bug Fixing	186	185
Unit Test Generation	157	157
Code Documentation	145	141
Regex Writing	139	135
Data Analysis	176	175
CSV / Spreadsheet Cleanup	155	153
ETL Scripting	157	157
JSON Extraction	149	138
Bulk Data Labeling	135	122
Long-Document Summarization	162	161
Short-Form Summarization	133	122
Blog Post Writing	143	141

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

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