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OpenAI: GPT-5.6 Luna Pro vs SpaceXAI: Grok Build 0.1

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

OpenAI: GPT-5.6 Luna Pro SpaceXAI: Grok Build 0.1
Vendoropenaix-ai
Quality Score100100
Input Price$0.10/M$1.00/M
Output Price$0.60/M$2.00/M
Context Window1,050,000256,000
Max Output128,000-
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--

Who wins by task?

TaskOpenAI: GPT-5.6 Luna ProSpaceXAI: Grok Build 0.1
SQL Generation 133 130
Code Review 132 126
Code Completion 131 116
Code Refactoring 136 127
Bug Fixing 136 130
Unit Test Generation 124 121
Code Documentation 131 125
Regex Writing 119 119
CI/CD Pipelines 120 117
CSV / Spreadsheet Cleanup 133 127
ETL Scripting 128 122
JSON Extraction 131 123
Bulk Data Labeling 129 121
OCR / Document Parsing 131 128
Table Extraction from PDFs 131 128
Long-Document Summarization 137 129
Short-Form Summarization 123 115
Blog Post Writing 121 118

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

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