OpenAI has officially rolled out the more streamlined GPT-5 Codex Mini model. This new iteration is tailored to provide efficient and budget-friendly code generation, while also broadening the usage allowance for Codex. Regarding service tiers, users of ChatGPT Plus, Business, and Edu have witnessed an approximate 50% surge in their rate limits. Meanwhile, ChatGPT Pro and Enterprise users are now entitled to priority task handling. OpenAI advises developers to opt for the GPT-5 Codex Mini when tackling straightforward tasks or when nearing their call rate thresholds. Upon reaching 90% of the call volume quota, Codex will automatically prompt a switch. The latest model is compatible with CLI and IDE extensions, with its API interface set to debut shortly. Furthermore, the OpenAI team has implemented foundational enhancements to Codex, successfully mitigating issues related to inconsistencies in actual call volumes.