### Check for existing issues

- [x] I have searched the existing issues and checked that my issue is not a duplicate.

### What happened?

When a model is configured with a Bedrock cross-region inference profile ID (e.g. us.anthropic.claude-sonnet-4-6), LiteLLM's get_model_info resolves pricing using the base-model key (anthropic.claude-sonnet-4-6) instead of the cross-region key (us.anthropic.claude-sonnet-4-6). Cross-region inference profiles carry a ~10 % surcharge, so the reported/logged cost is understated.

<img width="1413" height="52" alt="Image" src="https://github.com/user-attachments/assets/4ca475ca-ec3e-4130-88ec-b7d20bfe6412" />

**Expected behavior**

get_model_info("bedrock/us.anthropic.claude-sonnet-4-6") should return the cross-region pricing:

input_cost_per_token: 1.1e-06 ($1.10 / 1M tokens) output_cost_per_token: 5.5e-06 ($5.50 / 1M tokens)

**Actual behavior**

It returns the base-model pricing:

input_cost_per_token: 1e-06 ($1.00 / 1M tokens) output_cost_per_token: 5e-06 ($5.00 / 1M tokens)

### Steps to Reproduce

use proxy config: Proxy config ``` model_list: - model_name: Claude Sonnet litellm_params: model: bedrock/us.anthropic.claude-sonnet-…