Unverified50% confidenceFactExact time

The client-side auto-mode classifier now ignores ANTHROPIC_DEFAULT_SONNET_MODEL values pinned to Claude Sonnet 5.5 or Opus 5.5, and uses Claude Sonnet 5 instead.

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

10/2/2026

First Seen

Valid until: 12/31/2026

Sources

Claude Code v2.1.288 Update Deep Dive: Comprehensive Stability and Security Improvements

Related Entities

Claude Codeproduct Claude Sonnet 5model Opus 5.5model

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