GPT-5.6 Luna vs Muse Spark 1.1
Head-to-head technical comparison of intelligence, capabilities, and API pricing.
GPT-5.6 Luna
OpenAI
AI Mastery Index92
LMSYS Arena1455
Technical (MMLU-Pro)92%
Cost per 1M Tokens$0.2
Muse Spark 1.1
Meta
AI Mastery Index92.3
LMSYS Arena1458
Technical (MMLU-Pro)91.9%
Cost per 1M Tokens$1.25
Architect's Verdict
When comparing GPT-5.6 Luna and Muse Spark 1.1, Muse Spark 1.1 edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, GPT-5.6 Luna offers a more economical API at $0.2 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.