Introduction to GPT-4.5 OpenAI Livestream 2/27/25

[PaulBellow]

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GPT-4.5 is live in the API!

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. GPT-4.5 supports function calling, Structured Outputs, v…