ChatGPT o1-pro is OpenAI’s best and most expensive reasoning AI, and developers can use it right now
OpenAI announced that developers can now use ChatGPT o1-pro, its best and most expensive AI reasoning model yet.
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OpenAI announces GPT-4.5, warns it’s not a frontier AI model
OpenAI is calling the release its “most knowledgeable model yet,” but initially warned that GPT-4.5 is not a frontier model and might not perform as well as o1 or o3-mini. GPT-4.5 will have ...