head-to-head

Meta: Muse Spark 1.2 vs OpenAI: GPT-5.6 Luna

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

Meta: Muse Spark 1.2 OpenAI: GPT-5.6 Luna
Vendormetaopenai
Quality Score100100
Benchmark Score66.562.3
Input Price$1.25/M$0.20/M
Output Price$4.25/M$1.20/M
Context Window1,048,5761,050,000
Max Output943,718128,000
Tool Calling
Structured Output
Reasoning Mode
Vision
Audio-
Benchmark Scores
ai_index65.361.6

Who wins by task?

TaskMeta: Muse Spark 1.2OpenAI: GPT-5.6 Luna
Code Review 144 143
Code Completion 120 133
Code Refactoring 146 145
Bug Fixing 148 147
Unit Test Generation 131 131
Code Documentation 136 137
Regex Writing 125 125
CI/CD Pipelines 127 127
Frontend Component Design 129 129
Data Analysis 133 133
CSV / Spreadsheet Cleanup 136 136
ETL Scripting 137 136
JSON Extraction 122 131
Bulk Data Labeling 120 129
OCR / Document Parsing 134 134
Table Extraction from PDFs 134 134
Long-Document Summarization 147 147
Short-Form Summarization 118 126

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

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