Meta released its frontier large language model family, Muse Wonder (internally codenamed Watermelon), on October 12, 2026, making it generally available via the Meta Model API and Muse Code. This followed August reporting that targeted an October launch after July internal updates from Chief AI Officer Alexandr Wang on 10x compute scaling over Muse Spark and benchmark parity with GPT-5.5-class models. The timing aligned precisely with Meta’s stated window, reinforced by CEO Mark Zuckerberg’s watermelon-themed teaser and immediate developer access, locking in near-certain trader consensus. A realistic challenge would require the market to interpret “released” strictly as full open-weights availability or unrestricted public rollout rather than the confirmed API and subscriber access that occurred today.