head-to-head

MoonshotAI: Kimi K3 vs Anthropic: Claude Sonnet 5 (batch)

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-13.

	MoonshotAI: Kimi K3	Anthropic: Claude Sonnet 5 (batch)
Vendor	moonshotai	anthropic
Quality Score	100	100
Benchmark Score	96.9	91.6
Input Price	$3.00/M	$1.00/M
Output Price	$15.00/M	$5.00/M
Context Window	1,048,576	1,000,000
Max Output	-	128,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	98.5	91.2
ai_index_agentic	89.5	82.0
ai_index_coding	100.0	100.0

Who wins by task?

Task	MoonshotAI: Kimi K3	Anthropic: Claude Sonnet 5 (batch)
SQL Generation	173	172
Code Review	170	168
Code Completion	118	120
Code Refactoring	167	165
Bug Fixing	185	182
Unit Test Generation	157	155
Code Documentation	141	143
Regex Writing	135	136
CI/CD Pipelines	147	145
Frontend Component Design	149	147
Data Analysis	175	172
CSV / Spreadsheet Cleanup	153	154
ETL Scripting	157	155
JSON Extraction	138	140
Bulk Data Labeling	122	126
OCR / Document Parsing	147	147
Table Extraction from PDFs	147	147
Long-Document Summarization	161	160
Short-Form Summarization	122	123
Blog Post Writing	141	141

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