OpenAI is launching GPT-4.5 today, its newest and largest model. GPT-4.5 will be available as a research preview, and OpenAI is calling it the company’s “largest and most knowledgeable model yet,” but warning that it’s not a frontier model and might not perform as well as o1 or o3-mini.
GPT-4.5 will have better writing capabilities, improved world knowledge, and what OpenAI calls a “refined personality over previous models,” but it won’t introduce enough new capabilities to be…
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https://www.theverge.com/news/620021/openai-gpt-4-5-orion-ai-model-release
