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OpenAI: GPT-6 Luna Pro (batch) vs Meta: Muse Spark 1.3 Contributor

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

OpenAI: GPT-6 Luna Pro (batch) Meta: Muse Spark 1.3 Contributor
Vendoropenaimeta
Quality Score100100
Input Price$0.05/M$0.10/M
Output Price$0.25/M$0.20/M
Context Window1,050,0001,048,576
Max Output128,000943,718
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio-✓

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