ChatGPT & Codex changelog

OpenAI API — January, 2025

This release introduces o3-mini, a new small reasoning model specifically optimized for science, math, and coding tasks, benefiting users requiring specialized efficiency in these domains. Additionally, expanded access to the o1 series of models, renowned for complex reasoning through reinforcement learning, allows more users to tackle sophisticated challenges. These updates provide greater model choice and accessibility for diverse computational needs.

Added

  • Launched o3-mini, a new small reasoning model that is optimized for science, math, and coding tasks.

Changed

  • Expanded access to o1 model. The o1 series of models are trained with reinforcement learning to perform complex reasoning.