To calculate API costs for calls to GPT-4, ElevenLabs, and other APIs, you can use the

UsageCollector

class to track and summarize usage metrics, then apply the pricing rates from your API providers. Steps to Calculate Costs: 1. Initialize the UsageCollector: Use the

UsageCollector

class to collect metrics across your API calls. 2. Attach the UsageCollector: Configure your agent session to use the collector for tracking metrics. 3. Retrieve Usage Summary: After processing API calls, get the usage summary to access metrics like prompt tokens, completion tokens, characters processed, and audio duration. 4. Apply Pricing Rates: Use your API provider's pricing rates to calculate costs based on the collected metrics. For example: ◦ GPT-4: Calculate costs using prompt and completion tokens. ◦ ElevenLabs: Calculate costs using the number of characters processed. ◦ Other APIs: Use their specific metrics (e.g., audio duration for STT). 1. Sum the Costs: Add up the individual costs to get the total API cost. If you need detailed code examples or further assistance, let me know!