Meta: Muse Ember vs Meta: Muse Spark Open

For a sample job of 1 million input tokens and 250,000 output tokens, Muse Ember costs $0.23 and Muse Spark Open costs $2.31, so Muse Ember is about 10.3 times cheaper for the same work.

Both read up to 1,048,576 tokens at once, roughly 1,573 pages of text.

On our blended benchmark score Muse Ember leads 56.7 to 37.1.

Across the 20 tasks where they differ, Muse Ember scores higher on 20 (SQL Generation, Code Review, Code Completion and others).

Muse Ember was released in November 2026 and Muse Spark Open in October 2026.

Pick Muse Ember if you need lower cost, benchmark performance or the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.