“GPT-4.5 is also very expensive to run, OpenAI admits — so expensive that the company says it’s evaluating whether to continue serving GPT-4.5 in its API in the long term.”
GPT-4.5 costs 30 times GPT-4o for input and trails the reasoning models on math and science tests. OpenAI deleted a line calling it not a frontier model hours after release. It may not even stay in the API. The bigger model got much more expensive and not much better.