Implement AI Slop Detector Agent with GPT-5 & Claude Opus 4.1

Implement the core logic for the 'AI Detector' agent. This agent should utilize GPT-5 for initial classification and optionally invoke Claude Opus 4.1 for deeper authenticity analysis on borderline cases. Your implementation must demonstrate adaptive reasoning budgets: simple cases should be processed quickly, while complex ones trigger a more detailed, budget-aware analysis. Provide example prompts used for each model.