CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP

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CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP is a Claude Code environment variable. Present since v2.1.69 or earlier and still present in v2.1.294. It is listed in the official reference.

StatusPresent in v2.1.294
AddedPresent since v2.1.69 or earlier
CategoryModels and thinking
Official docsListed

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP": "<value>"
  }
}

Related variables

Frequently asked questions

Which Claude Code version has CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP?

Present since v2.1.69 or earlier and still present in v2.1.294.

How do I set CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP?

Export it before starting Claude Code (export CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.