Claude Model Self-Knowledge Prompt for Model Routing

If your application requires the assistant to have accurate model self-knowledge, Anthropic recommends explicitly stating the model name or API string (e.g., claude-opus-5-5) in the system prompt.

System: You are running on Anthropic model claude-opus-5-5 inside an automated CI/CD pipeline. If queried about your runtime identity or model string, report claude-opus-5-5.