Model Updates & Features - GPT-5 offers users a choice between "Auto", "Fast", and "Thinking" modes for customized performance [1] - Paid users can access additional models like o3, 4.1, and GPT-5 Thinking mini via a "Show additional models" toggle [2] - 4o model is available for all paid users by default [2] - 4.5 model is exclusively available to Pro users due to high GPU costs [2] Rate Limits & Context - GPT-5 Thinking has a rate limit of 3,000 messages per week, with extra capacity on GPT-5 Thinking mini after that limit [1] - GPT-5 Thinking's context limit is 196,000 tokens [1] Personality Development - The company is developing a warmer personality for GPT-5, aiming for a balance between the current personality and GPT-4o [3] - The company recognizes the need for more per-user customization of model personality [3]