OpenAI launches GPT-4.5, its "largest and most knowledgeable model" as a research preview, says it's not a frontier model and performance is "below o1, o3-mini" (Tom Warren/The Verge)

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Tom Warren / The Verge:OpenAI launches GPT-4.5, its “largest and most knowledgeable model” as a research preview, says it's not a frontier model and performance is “below o1, o3-mini”  —  OpenAI's newest and largest model is being released as a research preview.