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Anthropic: Claude Sonnet 5 vs MoonshotAI: Kimi K2.6

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.

Anthropic: Claude Sonnet 5 MoonshotAI: Kimi K2.6
Vendoranthropicmoonshotai
Quality Score100100
Benchmark Score63.965.3
Input Price$2.00/M$0.95/M
Output Price$10.00/M$4.00/M
Context Window1,000,000262,144
Max Output128,000235,929
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index63.044.5
eqbench-76.6

Who wins by task?

TaskAnthropic: Claude Sonnet 5MoonshotAI: Kimi K2.6
SQL Generation 140 141
Code Review 144 144
Code Completion 118 131
Code Refactoring 146 144
Bug Fixing 148 148
Unit Test Generation 131 131
Code Documentation 135 135
Regex Writing 123 126
CI/CD Pipelines 127 127
Frontend Component Design 129 130
Data Analysis 133 135
CSV / Spreadsheet Cleanup 135 134
ETL Scripting 136 136
JSON Extraction 121 131
Bulk Data Labeling 118 128
OCR / Document Parsing 134 132
Table Extraction from PDFs 134 132
Long-Document Summarization 146 146
Short-Form Summarization 116 126
Blog Post Writing 128 129

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

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