Programmatic Way to Retrieve Token Pricing for Gemini Models?

**Is there a supported API call (or SDK method) to fetch the current pricing for each Gemini model?**
If not, are there any recommended best practices for keeping pricing up-to-date within applications?
Are there plans to provide such a feature in the future?

**Use case:**
I’d like to avoid hard-coding pricing information, to reduce maintenance and prevent discrepancies if Google updates prices.

Thanks in advance!