Meta Launches Muse Wonder: Leveraging Prometheus Data Center and Active Memory to Surpass Claude Opus 5.5 in SWE-Marathon with Score of 57.5
Meta Superintelligence Labs (MSL) has officially launched Muse Wonder, its first closed-source frontier model, alongside the enhanced Full version. Trained on the gigawatt-scale Prometheus data center in Ohio, this release marks Meta's return to the top tier of AI development just 14 months after establishing MSL. The core innovation lies in introducing "Active Memory" and "Active Focus" mechanisms, which significantly enhance the agent's ability to persist information across sessions and autonomously navigate long-horizon complex tasks, shifting from pure reasoning to autonomous action. Benchmark data reveals that Muse Wonder Full scores 56 on the Artificial Analysis Intelligence Index v4.3, an 8-point increase over its predecessor. Its agentic capabilities have surged, with Terminal-Bench 4.0 scores jumping from 33% to 57% and GDPval-AA v2.1 Elo ratings rising by 176 points. Notably, it achieved a score of 57.5 in the SWE-Marathon test, substantially outperforming Claude Opus 5.5's 46.3, and scored 79.0 in DeepSWE coding benchmarks, demonstrating superior performance in long-term code generation and legal verticals. Commercially, Meta employs a tiered strategy: the standard version is available via API ($4/M input, $20/M output), while the full-capability Wonder Full is restricted to Muse Code subscribers. This approach aims to build a personal and professional agent ecosystem and capture high-value B2B market share. Despite initial billing glitches, this launch establishes Meta as a direct competitor to Anthropic and OpenAI, offering developers a powerful solution for long-horizon tasks.
LatestMuse Wonder Standard is now available via API with 1M token context and multimodal support, while Wonder Full remains exclusive to Muse Code subscribers. General user access timelines are unclear due to conflicting official statements. Initial deployment faced quota tracking bugs, highlighting stability challenges, though Zuckerberg claims the model matches or exceeds GPT-6 Astra and Claude Opus 5.5 in specific benchmarks.