Claude Pro: Opus Requires Extra Usage in Claude Code

Claude Pro: Opus model will only be available if extra usage is enabled

Anthropic lists 6 Claude Code models, and Pro users need extra usage enabled and purchased to use Opus. The guide gives 3 configuration paths: /model, --model, and ANTHROPIC_MODEL in zsh or bash. The post does not disclose extra usage pricing or quotas.

Why it matters: HKR-H/K/R all pass, but the facts come from a help doc and cover Claude Code access/configuration, not a new model or major capability. Anthropic relevance lifts it to the lower featured band.