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Opus 5.5 is more capable that GPT-6 for most tasks.
Evidence-limited assessment
Confidence not measured.
Accuracy: Unverifiable. The excerpts do not establish that Opus 5.5 is more capable than GPT-6 overall for most tasks. They show some benchmark wins over GPT-6 Astra and Sol, but coverage is partial and fragmented, while one source says Astra outperformed Opus 5.5 on AutomationBench and Terminal-Bench-Science 0.1. Another source compares Opus 5.5 only to GPT-6 Sol and notes Sol is a mid-tier model below Astra. No supplied source provides a comprehensive broad-task comparison proving Opus 5.5 beats GPT-6 as a whole for most tasks.