OpenAI has officially announced that it will discontinue API access to its GPT-4.5 model as of July 14. The company is now recommending the recently launched GPT-4.1 model as a replacement.
According to OpenAI, developers will still be able to use GPT-4.5 via the API until July 14. After that date, the model will only remain available to ChatGPT Plus users as a research preview.
High Cost Was a Key Factor
GPT-4.5, developed under the code name “Orion”, was introduced in February. It was trained with more data and greater computing power than its predecessors and was particularly notable for its ability to write convincingly and generate persuasive content. However, the model failed to meet expectations in certain industry benchmarks.
OpenAI confirmed that GPT-4.5 had extremely high operational costs, pricing it at $75 per million input tokens and $150 per million output tokens—making it one of the most expensive models offered by the company.
GPT-4.1 Is the Recommended Alternative
OpenAI stated that GPT-4.1 delivers similar or even better performance at a significantly lower cost. As a result, developers are encouraged to migrate to GPT-4.1 for their applications. The company also reassured users that GPT-4.5 will remain accessible on ChatGPT for Plus subscribers, even after its removal from the API.
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