Model Normalization

normalize_model() resolves shorthand names into provider-qualified IDs.

Examples:

• claude-sonnet-4-6 -> anthropic/claude-sonnet-4-6
• gpt-4o-mini -> openai/gpt-4o-mini
• kimi-k2 -> moonshot/kimi-k2-0905-preview

What normalization handles

• Provider prefix inference from model-name fragments
• Anthropic version formatting fixes (4.6 -> 4-6)
• Alias expansion for known shorthand names
• Best-effort disambiguation for Claude family inputs

Normalization runs before strategy detection and before pricing/usage lookup.