Introducing Structured Outputs

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This is great for my research project, comparing 4o and 4o-mini as base models for an assistant concerning user experience. Structured Outputs with response_format work well with the new 4o model but seems not to work with 4o-mini yet. I contiously get an error when switching from 4o to 4o-mini, without changing anything else. - Anyways, can’t wait to integrate this feature in my other projects soon.