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Muse Spark 1.1 is the first model in the Spark line to offer an API.

Unlike the original Muse Spark, the 1.1 release is the first Spark model that exposes an API for developers. ✦ AI generated

Simon Willison · Simon Willison's Weblog · 2026-07-09 · original ↗

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here's Muse Spark 1.1 - the first Spark model to offer an API

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✳ API ✳ Muse Spark 1.1

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Meta's Spark 1.1 release, moving from free open-weight distribution to an aggressively priced paid API, means Meta is now competing toe-to-toe on the same commercial model as the frontier labs, which is bad news for OpenAI and Anthropic.Rory · 20VC · conf 60%

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provides context → A few days of preview access to Muse Spark 1.1 was enough time to build llm-meta-ai, a new plugin giving the LLM CLI tool and Python library access to the model.Simon Willison · Simon Willison's Weblog