How to attribute AI API costs to teams and features in 2026

OpenAI and Anthropic still give you strong org and project level usage data, but not true per-feature chargeback unless you add your own metadata before each request leaves your app. Amazon Bedrock changed on April 17, 2026: native IAM principal attribution and project-based tagging now help with team level visibility, but shared gateways still need app context for feature and tenant allocation. The cleanest pattern is request-time tagging with team_id, feature_id, tenant_id, provider, model, and token counts d in your own event stream.