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MoonshotAI: Kimi K3 vs Anthropic: Claude Opus 4.8 (batch)

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

MoonshotAI: Kimi K3 Anthropic: Claude Opus 4.8 (batch)
Vendormoonshotaianthropic
Quality Score100100
Benchmark Score96.994.7
Input Price$3.00/M$2.50/M
Output Price$15.00/M$12.50/M
Context Window1,048,5761,000,000
Max Output-128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index98.594.6
ai_index_agentic89.581.5
ai_index_coding100.0100.0
eqbench-83.3

Who wins by task?

TaskMoonshotAI: Kimi K3Anthropic: Claude Opus 4.8 (batch)
SQL Generation 173 178
Code Review 170 179
Code Completion 118 121
Code Refactoring 167 176
Bug Fixing 185 193
Unit Test Generation 157 161
Code Documentation 141 148
Regex Writing 135 138
CI/CD Pipelines 147 151
Frontend Component Design 149 151
Data Analysis 175 178
CSV / Spreadsheet Cleanup 153 158
ETL Scripting 157 164
JSON Extraction 138 138
Bulk Data Labeling 122 123
OCR / Document Parsing 147 149
Table Extraction from PDFs 147 149
Long-Document Summarization 161 171
Short-Form Summarization 122 123
Blog Post Writing 141 146

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

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