ANTHROPIC_DEFAULT_OPUS_MODEL
Updated by Alex Sorokoletov
ANTHROPIC_DEFAULT_OPUS_MODEL is a Claude Code environment variable: Override Opus model ID. Its release history is not tracked here. It is listed in the official reference.
| Status | Present in v2.1.294 |
|---|---|
| Category | Models and thinking |
| Official docs | Listed |
How to set it
For one session, export it in the shell that starts Claude Code:
export ANTHROPIC_DEFAULT_OPUS_MODEL=<value>
claudeTo apply it to every session, add it to the env object of a settings file:
// ~/.claude/settings.json
{
"env": {
"ANTHROPIC_DEFAULT_OPUS_MODEL": "<value>"
}
}Related variables
ANTHROPIC_DEFAULT_OPUS_MODEL_DESCRIPTIONANTHROPIC_DEFAULT_OPUS_MODEL_NAMEANTHROPIC_DEFAULT_OPUS_MODEL_SUPPORTED_CAPABILITIESANTHROPIC_DEFAULT_FABLE_MODELANTHROPIC_DEFAULT_FABLE_MODEL_DESCRIPTIONANTHROPIC_DEFAULT_FABLE_MODEL_NAMEANTHROPIC_DEFAULT_FABLE_MODEL_SUPPORTED_CAPABILITIESANTHROPIC_DEFAULT_HAIKU_MODEL: Override Haiku model ID.
Frequently asked questions
What does ANTHROPIC_DEFAULT_OPUS_MODEL do?
Override Opus model ID
Which Claude Code version has ANTHROPIC_DEFAULT_OPUS_MODEL?
Its release history is not tracked here.
How do I set ANTHROPIC_DEFAULT_OPUS_MODEL?
Export it before starting Claude Code (export ANTHROPIC_DEFAULT_OPUS_MODEL=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.