I asked GPT about Metronome's usage billing for Open AI and this is what it had to say!

Metronome is a billing platform designed for companies with complex pricing models like OpenAI. It handles usage-based billing, subscription management, invoicing, and payment processing. However, it has some limitations in handling more intricate billing logic without customization, real-time usage feedback, advanced idempotencies, event enrichment, and comprehensive tax compliance. Togai by Zuora is a complete billing solution that can address these gaps with its advanced pricing capabilities, such as managing complex price plans and supporting multiple billing timelines. It offers a valuable blueprint for other companies facing similar billing complexities.