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MoonshotAI: Kimi K3 (batch) vs OpenAI: GPT-5.6 Luna (batch)

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

MoonshotAI: Kimi K3 (batch) OpenAI: GPT-5.6 Luna (batch)
Vendormoonshotaiopenai
Quality Score100100
Benchmark Score96.287.6
Input Price$3.00/M$0.10/M
Output Price$15.00/M$0.60/M
Context Window1,048,5761,050,000
Max Output943,718128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index98.586.3
ai_index_agentic89.577.4
ai_index_coding100.0100.0

Who wins by task?

TaskMoonshotAI: Kimi K3 (batch)OpenAI: GPT-5.6 Luna (batch)
SQL Generation 173 172
Code Review 170 167
Code Completion 118 133
Code Refactoring 167 164
Bug Fixing 185 180
Unit Test Generation 157 154
Code Documentation 141 143
Regex Writing 135 137
CI/CD Pipelines 147 144
Frontend Component Design 149 146
Data Analysis 175 171
CSV / Spreadsheet Cleanup 153 154
ETL Scripting 157 154
JSON Extraction 138 149
Bulk Data Labeling 122 135
OCR / Document Parsing 147 146
Table Extraction from PDFs 147 146
Long-Document Summarization 161 160
Short-Form Summarization 122 132
Blog Post Writing 141 140

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

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