### Check for existing issues

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

### The Feature

[bedrock/eu-west-1/qwen.qwen3-next-80b-a3b](https://github.com/BerriAI/litellm/blob/litellm_internal_staging/model_prices_and_context_window.json) has no entry in the pricing map. The cost calculator falls back to the bare qwen.qwen3-next-80b-a3b entry which has US pricing ($0.15/$1.20 per 1M tokens). Actual [eu-west-1 pricing](https://aws.amazon.com/bedrock/pricing/) is $0.18/$1.41 per 1M tokens.

<img width="1039" height="597" alt="Image" src="https://github.com/user-attachments/assets/119d7772-f3ce-4af7-a217-51ff97c1a540" />

Suggested entry: ``` "bedrock/eu-west-1/qwen.qwen3-next-80b-a3b": { "input_cost_per_token": 1.8e-07, "output_cost_per_token": 1.41e-06, "litellm_provider": "bedrock_converse", "max_input_tokens": 128000, "max_output_tokens": 8192, "max_tokens": 8192, "mode": "chat", "supports_function_calling": true, "supports_system_messages": true, "supports_native_structured_output": true, "source": "https://aws.amazon.com/bedrock/pricing/" } ```

Thanks

### Motivation, pitch

We are using t…