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Impossibl · First-party API · LLM

meta/muse-spark-open

Release announcedReleased on Oct 15, 2026

Impossibl released meta/muse-spark-open on Oct 15, 2026. Source: impossibl.com · Last checked Oct 19, 2026

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Release announced

Released on Oct 15, 2026

Impossibl announced this model on 2026-10-15. ai api.

Hosting route
First-party API
Affected scope
ai api
Announced
Oct 15, 2026
First seen by ModelClock
Oct 19, 2026

What the provider published

impossibl.com ↗

meta/muse-spark-open

new model

muse spark open joins the ai api. meta's open-weight reasoning model for coding and long-running agent work, with a 1m context window, text and image input, and six reasoning effort levels, at $1.25 per million input tokens and $4.25 per million output.

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