Meta launches Muse Wonder and Muse Wonder Full models

On October 12 and 13, 2026, Meta rolled out two new models, Muse Wonder and Muse Wonder Full, on the Meta Model API platform. According to TestingCatalog, Muse Wonder Full is described as Meta's most capable model, running at max reasoning for the hardest, longest-running work, and is available to Muse Code subscribers rather than on the API, while Muse Wonder can be called through the Meta Model API. The Verge reported that Meta says the models can go toe-to-toe with the industry's best, that they are available to Muse Code subscribers as of launch, and that Wonder will later power its Muse Agent, though no timeline was given. The comparison with OpenAI and Anthropic models comes from Meta's internal benchmarks.

Other outlets followed the same day. The New York Times said the two models are meant to compete with cutting-edge models from rivals such as Anthropic and OpenAI, without giving model size, access details, or evaluation results. Techmeme, citing Meta AI Research, said the models deliver state-of-the-art performance on personal and professional agentic tasks, again without parameters, access terms, or third-party benchmarks. Bloomberg reported that Meta says Muse Wonder has reached the AI frontier, the result of 14 months of work by its rebuilt superintelligence team, and that the model is seen as a key test for that costly team. Wired described Muse Wonder as Meta's biggest model, rivaling the world's best, with new features to keep agents from going off the rails, and said the release puts Meta back at the AI frontier.

Earlier context came from a Wall Street Journal-style report on October 12. Meta officially launched its AI agent Muse on September 8, after which its stock rose 27% over 12 trading days, peaking at $777.59, with the forward price-to-earnings ratio climbing from 14x in late August to 21x. Alternative-data firm TickerTrends showed Muse's average daily net new users falling from about 198,000 at the September peak to about 74,000, a 62.4% drop, with downloads down more than 21% from the peak. Morgan Stanley estimated Muse's per-user monthly serving cost at between $3 and $130, with a base case of $37, or $445 a year, above Meta's global average revenue of about $70 per user per year. The bank also said real monetization would not come until late 2027 to 2028, and noted that Meta's valuation rests on a 1 billion-user growth story whi