热核算力 is a paid API aggregation service for developers who need OpenAI-compatible GPT access. It currently offers GPT GO, PLUS and PRO model groups and supports the Responses, Chat Completions and Messages endpoints through https://api.codexhot.com/v1. Developers create an API key after funding their account with a redemption voucher; vouchers start at CNY 5. Public guides cover setup, SDK use, model groups and common errors. There is no free plan or free trial. This is a third-party service, not the official OpenAI API.