Meta releases Muse Wonder and Muse Wonder Full frontier AI models with 1 million token context window

Meta released Muse Wonder and Muse Wonder Full, its first frontier-class models from Meta Superintelligence Labs, featuring a 1 million token context window. On Meta's internal charts, Wonder Full leads GPT-6 Astra and Claude Opus 5.5 in long-horizon coding, legal agent work, and memory, though Artificial Analysis ranks Opus 5.5 first at 58 versus Wonder Full's 56. Muse Wonder is available via the Meta Model API for $4 per million input tokens and $20 per million output tokens, matching Opus 5.5 and under GPT-6 Astra's pricing.