GPT5.1 is capable of long-process code planning

GPT-5.1 Instant and GPT-5.1 Thinking were released, and GPT-5 ushered in an important iterative update

On November 12, 2025, OpenAI published a blog on its official website, announcing the launch of a new version of GPT-5.1 based on the GPT-5 series, an...