Tolan is an AI system developed by OpenAI that uses the GPT-5.1 model to create a voice-first companion. It achieves this through three key features: low-latency responses, real-time context reconstruction, and memory-driven personalities. These capabilities allow for more natural conversations with the AI. --- Why it matters: This matters because it demonstrates how large language models like GPT-5.1 can be used to build interactive AI systems that are capable of engaging in conversational dialogue. Source: https://openai.com/index/tolan