OpenAI has unveiled GPT-5.5 Instant, a cutting-edge default model for its popular chatbot, ChatGPT. According to the company, this new model boasts significant improvements in accuracy, particularly in high-stakes fields like law, medicine, and finance. One notable enhancement is a reduction in "hallucinations" – instances where the chatbot provides incorrect or fabricated information in these sensitive areas. Meanwhile, the volunteer model still manages to deliver the speedy responses that users have come to expect from its predecessor.