OpenAI Updates ChatGPT: It Now Has Eight "Characters"
The GPT-5.1 Instant model will be the primary one for most tasks in ChatGPT. It uses adaptive thinking to independently assess how much time and resources will be needed for a response. At the same time, GPT-5.1 Thinking is designed for more complex tasks that require deep analytics. OpenAI claims that both versions show outstanding results in technical tests, including the mathematical and programming tests AIME 2025 and Codeforces. One of the most significant innovations is the introduction