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Auto-Route Claude Refusals by Category on Opus 5 — ContentBuffer guide

Auto-Route Claude Refusals by Category on Opus 5

K
Kodetra Technologies··8 min read Intermediate

Summary

Auto-recover from Claude safety refusals on Opus 5 with one line of code: fallbacks='default'.

Auto-Route Claude Refusals by Category on Opus 5

Anthropic shipped Claude Opus 5 on July 24, 2026, and buried in the release notes is a small change that quietly fixes a real production headache: the fallbacks parameter now takes a "default" mode. Instead of hand-maintaining a chain of backup models, you tell the API to route a refused request to whatever fallback Anthropic recommends for that specific refusal category. It is one line of code, and it turns a class of silent, hard-to-monitor failures into automatic recovery.

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