Meta AI · Shipped

Muse Wonder release date

What we forecast

First forecast on Sep 14, 2026: Oct 15, 2026. Last forecast before launch, on Oct 11, 2026: Oct 16, 2026. It shipped 4 days before that date.

Specs, benchmarks and changelog are on the Muse Wonder model card at TPS.

Released

Oct 12, 2026

What we know

Meta AI's new 'most capable' Muse Wonder family, with a Muse Wonder Full variant, is usable through the llm-meta-ai plugin at six reasoning levels (minimal to max). Simon Willison reports Artificial Analysis rates Muse Wonder (Max) as comparable to GPT-6.1 Sol. The post does not state parameter counts, context length, or weight availability.

Spec

Params: Not stated
Active: Not stated
Context: 1048576 tokens
Weights: Closed
Modality: Not stated
Codename: Watermelon

Every claim

9 from 5 sources

TechmemeRepostOct 12
Techmeme relays Artificial Analysis reporting that Meta has released Muse Wonder, scoring 52 on its Intelligence Index v4.3, with no release date given.
no date givenno datesource
TechmemeRepostOct 12
Techmeme relays Meta AI Research's introduction of Muse Wonder, claimed state-of-the-art on agentic tasks.
points at Oct 12exact datesource
TechmemeRepostOct 12
Techmeme relays CNBC's report that Meta debuted Muse Wonder, available now to Muse app subscribers, via Meta Model API, and Muse Code.
points at Oct 12exact datesource
OpenRouter catalogSpotted in the wildOct 12
OpenRouter's catalog lists Meta's Muse Wonder as routable with id meta/muse-wonder, with a 1,048,576-token context window, as of the document date.
points at Oct 12exact datesource
TechmemePressOct 12
FT interview relays Zuckerberg touting the release of a new Muse Wonder model that he says has caught Meta up with frontier rivals; no release date given.
no date givenno datesource
Simon WillisonPressOct 12
Simon Willison reports Meta AI released Muse Wonder as its new 'most capable models', with no release date stated in the post.
no date givenno datesource
PolymarketBetting marketSep 14
Polymarket, “Meta's "Watermelon" model released by...?”: 88% by Oct 15, 94% by Oct 31, 98% by Nov 30. $96K traded.
no date givenno datesource
TechmemeFrom the labSep 2
Meta's Watermelon model is coming soon.
no date givenno datesource
The Decoder (reporting The Information)PressAug 25
Meta's new model Watermelon is due in October, alongside its paid Hatch agent platform (The Information, via The Decoder).
points at Oct 16monthsource

Official announcement