Official Statement: Today we’re excited to announce `gpt-4.5-preview`, our largest model yet, as a research preview. It has deeper world knowledge, with a better understanding of user intent. GPT-4.5 is designed for more natural conversation. It excels at tasks requiring creativity, empathy, and broad general knowledge, including writing help, coaching, brainstorming, and nuanced communication. We’ve also seen it perform well at agentic planning and execution. Get started with GPT-4.5 in the API GPT-4.5 supports function calling, Structured Outputs, vision, streaming, system messages, evals, and prompt caching. It’s available via our Chat Completions, Assistants, and Batch APIs today. GPT-4.5 is very large and compute-intensive, so it’s not a replacement for GPT-4o. A typical query costs on average $68 / 1M tokens, with cache discounts ($75 / 1M input tokens, $37.5 /1M cached input, $150 / 1M output). Batch jobs are discounted 50% and cached input is discounted 50%. We’re evaluating whether to continue serving it in the API long-term as we balance supporting current capabilities with building future models. If GPT-4.5 plays a unique role for your use-case, let us know. Follow the links below to read more ... https://platform.openai.com/docs/models#gpt-4-5 https://openai.com/index/introducing-gpt-4-5/