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)
