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

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-22.

Meta: Muse Spark 1.2 Contributor OpenAI: GPT-5.6 Luna
Vendormetaopenai
Quality Score100100
Benchmark Score-88.2
Input Price$0.10/M$0.20/M
Output Price$0.20/M$1.20/M
Context Window1,048,5761,050,000
Max Output-128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio✓-
Benchmark Scores
ai_index-86.3
ai_index_agentic-77.4
ai_index_coding-100.0

Who wins by task?

TaskMeta: Muse Spark 1.2 ContributorOpenAI: GPT-5.6 Luna
SQL Generation 134 172
Code Review 132 167
Code Completion 131 133
Code Refactoring 136 164
Bug Fixing 136 180
Unit Test Generation 124 154
Code Documentation 131 143
Regex Writing 119 137
CI/CD Pipelines 120 144
Frontend Component Design 122 146
Data Analysis 124 171
CSV / Spreadsheet Cleanup 134 154
ETL Scripting 128 154
JSON Extraction 131 149
Bulk Data Labeling 129 135
OCR / Document Parsing 131 146
Table Extraction from PDFs 131 146
Long-Document Summarization 138 160
Short-Form Summarization 123 132
Blog Post Writing 122 140

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

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