Developers get 21x cheaper Muse Spark access if they let Meta train on their prompts

Meta released Muse Spark 1.3 on September 2 with two pricing tiers.

Developers who let Meta train on their prompts and outputs pay as little as one-twenty-first of the standard rate.

Muse Spark’s cached tokens drop 75x

A million input tokens run for $1.25, and a million output tokens run for $4.25 on the standard plan. The Contributor tier reduces those to 10 cents and 20 cents, a savings averaging about 95%.

The biggest discount is on cached input tokens, which allows developers to reuse context without paying for reprocessing. Those fall from $0.15 to $0.002 per million, a 75x cut that’s close to free for repeated workflows to run.

In return, developers surrender control of their data. All prompts, responses, and usage patterns on the Contributor tier are included in Meta’s training pipeline.

The standard plan lets users make 3,000 requests per minute, but Contributor access only lets users make 100 RPM. This is too few requests for production-scale functionality.

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