Legacy model remap opt-out / Claude Code v2.1.68

What

Users who were automatically migrated from legacy Opus models to Opus 4.6 can now opt out by setting an environment variable.

Usage

export CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP=1

Details

When your model is auto-remapped to Opus 4.6, the notification now reads: "Model updated to Opus 4.6 · Set CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP=1 to opt out"
The notification displays for 8 seconds (up from 3) when the opt-out message is shown, giving you time to read the instructions
Setting the environment variable to 1 disables the automatic model remapping entirely
The remap behavior is also gated by the tengu_grey_wool feature flag (defaults to enabled)

Evidence

Model remap opt-out (search for "CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP") — gy1() at line ~535228

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

Legacy model remap opt-out