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

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

MoonshotAI: Kimi K3 (batch) OpenAI: GPT-5.6 Terra Pro
Vendormoonshotaiopenai
Quality Score100100
Benchmark Score96.2-
Input Price$3.00/M$2.00/M
Output Price$15.00/M$12.00/M
Context Window1,048,5761,050,000
Max Output943,718128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index98.5-
ai_index_agentic89.5-
ai_index_coding100.0-

Who wins by task?

TaskMoonshotAI: Kimi K3 (batch)OpenAI: GPT-5.6 Terra Pro
SQL Generation 173 132
Code Review 170 132
Code Completion 118 117
Code Refactoring 167 136
Bug Fixing 185 136
Unit Test Generation 157 124
Code Documentation 141 129
Regex Writing 135 117
CI/CD Pipelines 147 120
Frontend Component Design 149 122
Data Analysis 175 124
CSV / Spreadsheet Cleanup 153 132
ETL Scripting 157 128
JSON Extraction 138 121
Bulk Data Labeling 122 117
OCR / Document Parsing 147 131
Table Extraction from PDFs 147 131
Long-Document Summarization 161 136
Short-Form Summarization 122 113
Blog Post Writing 141 120

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

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