Meta LLM Medium Closed weights

Muse Spark

218 days since Meta announced it · 8 Apr 2026

Muse Spark is a closed-weights LLM from Meta, announced 8 Apr 2026. It costs $1.25 per 1M input tokens and $4.25 per 1M output tokens.

Input: $1.25; per 1M tokens
Cache write: —; per 1M tokens
Cache read: $0.15; per 1M tokens
Output: $4.25; per 1M tokens
Context window: —; tokens
Parameters: —; not disclosed

Our coverage

1 story

Meta releases open 816B Muse Spark coding model
15 Oct 2026

Meta · Medium

closed weights

A new one every ~28 days — due now.

Muse Spark 1.3 +28d 2 Sep 2026
Muse Spark 1.2 +27d 5 Aug 2026
Muse Spark 1.1 +92d 9 Jul 2026
Muse Spark 8 Apr 2026

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Facts last updated 1 Nov 2026, from Meta’s own pages.