Muse Spark 1.1 API is 6x cheaper than GPT-5.6: should you switch your AI agents?

Muse Spark 1.1 API is 6x cheaper than GPT-5.6: should you switch your AI agents? Summary. Meta opened its first paid model API on July 9, 2026 with Muse Spark 1.1 priced at \(1.25 per million input to