Some OpenRouter anthropic model files don't extend from the anthropic model/are outdated

[Badbird5907]

I've noticed that some OpenRouter Anthropic models don't extend from their anthropic counterparts.

For example, openrouter/models/claude-sonnet-4.6.toml seems to be an outdated version of anthropic/models/claude-sonnet-4-6.toml. (1M token limit is now the default and doesn't cost extra).