
Claude Opus 4.6 Got Worse? How to Diagnose Thinking, Context Loss, and Routing Problems in 2026
Claude Opus 4.6 can feel worse for four very different reasons: thinking mode mismatch, long-thread context handling, shared usage pressure, or route differences between Claude surfaces. This guide shows how to identify the branch, run the right first test, and know when the problem is serious enough to escalate.









































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