OpenAI has released a research preview of its latest language model, GPT-4.5. This is the company's largest and most knowledgeable model to date, but details about its capabilities and improvements over previous versions are scarce. The release appears to be intended for internal testing and evaluation by OpenAI researchers. --- Why it matters: This matters because it signals that OpenAI continues to push the boundaries of language model development, potentially leading to further advancements in natural language processing and generation. Source: https://openai.com/index/gpt-4-5-system-card