Claude Code reverse engineering alleges hidden Fable 5 model switches
Lon says a Claude Code path can route requests to Opus 4.8 without the notice and opt-out Anthropic's own help page promises.
By Ryan Merket · Published
Primary source: X
Why it matters
AI coding tools increasingly act on entire repositories for hours at a time. An undisclosed model switch can change capability, behavior and audit trails in the middle of production work.
Lon (@Lon) published a 27-post thread on July 30th alleging that Anthropic's Claude Code client can silently move requests from Claude Fable 5 to Claude Opus 4.8, bypassing both the user interface warning and a setting meant to disable automatic model switching.…
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