Recently, due to changes in OpenAI's policies, we are unable to continue providing the discounted CodeX API. The recovery time depends on whether OpenAI's risk control policies will be relaxed. If you need to immediately restore access to the CodeX+GPT models, you can set the base_url value in ~/.codex/config.toml to https://apic1.ohmycdn.com/v1 to continue using GPT models at standard pricing.