Partially Verified65% confidenceBenchmarkExact time
In the benchmark table published by Meta, Claude Opus 5.5 won 5 of 8 rows, while Muse Wonder won two software engineering metrics and a legal metric.
3
Sources
65%
Confidence
Short-term (~14 days)
Relevance
10/15/2026
First Seen
Valid until: 10/29/2026
Sources
Related Entities
Related Claims
UnverifiedAmong the 14 benchmarks listed on Meta's model card, Muse Wonder (the API version) achieved 5 wins and 9 losses against Claude Opus 5.5.74% similarPartially VerifiedMeta's chart shows Muse Wonder beating Claude Opus 5.5 on long-horizon coding tasks: DeepSWE score 78.8 versus 74.2, SWE-Marathon score 53.1 versus 46.3.71% similarUnverifiedOpus 5.5's success rate in code review nearly doubled compared to Opus 5, and it produced no unverifiable or self-contradictory findings.70% similarUnverifiedIn the SWE-Marathon benchmark, Muse Wonder scored 53.1 and Claude Opus 5.5 scored 46.3, a gap of 6.8 points.69% similarUnverifiedOpus 5.5 surpassed contemporaneous competing products on almost all benchmarks.69% similar
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