New Features:
- Claude Opus 4.5 support (claude-opus-4-5-20251101)
- Updated pricing: $5/$25 per million tokens (input/output)
- State-of-the-art performance for coding, agents, and computer use

Changes:
- Updated all model references from Opus 4.1 to Opus 4.5
- Updated model mappings in Bedrock and Vertex integrations
- Updated pricing information in documentation and examples

See https://www.anthropic.com/news/claude-opus-4-5 for model details.