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Meta releases Muse Wonder, whose top version beats Claude Opus 5.5 on 8 of 14 benchmarks

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Meta has released Muse Wonder, a model family whose top version, Full, beats Claude Opus 5.5 on 8 of 14 published benchmarks.

Full scores 57.5 against 46.3 on SWE-Marathon, an ultra-long engineering test, and 79.0 against 74.2 on DeepSWE 1.1, where Meta says the runs were independent and third-party.

On Harvey's legal agent benchmark, Full scores 13.1 against Opus 5.5's 4.2, crediting only fully finished tasks without hallucination.

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Rohan PaulVerified on X
@rohanpaul_ai

Muse wonder brings Meta back to the frontier of AI

They just released Muse Wonder, whose top version beats Claude Opus 5.5 on 8 of 14 published benchmarks.

A rally major milestone for Zuckerberg

Its ahead of GPT-6 Astra and Claude Fable 5.1 on long-running coding, legal work and business automation.

The widest gap comes on SWE-Marathon, an ultra-long engineering test, where Full scores 57.5 against 46.3 for Opus 5.5.

Full also leads DeepSWE 1.1, a long-horizon coding test, 79.0 to 74.2, in what Meta says were independent third-party runs.

On Harvey’s legal agent benchmark, which credits only tasks finished in full without hallucination, Full scores 13.1, more than triple Opus 5.5’s 4.2.

Mark Zuckerberg@finkd
Introducing Muse Wonder, our new family of frontier models with state of the art performance for personal and professional agentic work.
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Source: Rohan Paul · x.comPublished · added here

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Meta / LlamaAI agentsAI codingModel releasesEvals & benchmarks