GPT-5.1 is a family of four large language models within OpenAI's GPT series. Two were released on November 12, 2025; two more were released one week later on November 19.
GPT-5.1 is a family of four large language models within OpenAI's GPT series. Two were released on November 12, 2025; two more were released one week later on November 19.
== Features == GPT-5.1 adds "shopping research", multimodal features, and customizable personalities; it has 8 personality options. OpenAI describes it as having a "warmer personality" by default compared to GPT-5.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).