Meta has released Muse Wonder, a new frontier model from Meta Superintelligence Labs, along with a heavier variant called Muse Wonder Full. Wonder is available today through the Meta Model API and Muse Code, while Wonder Full is limited to Muse Code subscribers.

Meta is positioning the models for long-running agent work rather than plain chat. The company highlights two new capabilities, Active Memory for carrying context across sessions and Active Focus for staying on extended projects, and says the models were trained at its large Prometheus data centre with more test-time compute to handle unfamiliar tasks.

Wonder is also Meta's plan to revive its Muse agent, which has reached roughly nine million downloads but has seen slowing growth and weaker retention than ChatGPT. Meta says Wonder will soon power Muse for subscribers on its $20 and $100 monthly tiers, with stronger skills in areas such as health, finance and legal work. Independent testing has not yet settled how the models compare with rivals such as GPT-6 Astra and Claude Opus 5.5.