AI BriefingClaude Code, Additional Charges for Opus
Key point
Claude Pro users must pay for additional usage to use Opus in Claude Code.
Details
According to Anthropic's Claude Code model configuration documentation, Claude Pro plan users can only use the Opus model after activating and purchasing additional usage.
The default model is set to Sonnet 4.5, and while Opus 4.5 appears in the model list, it is locked behind separate billing for Pro users.
The key points are as follows.
- Opus access is not possible with a Pro subscription alone.
- Additional usage purchase is required separately from the Claude Code subscription.
- This change appeared in the support documentation before any blog announcement.
Users are pointing out that this creates a gap between the "full capabilities" that Claude Pro advertised and the actual access conditions.
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