since chatgpt opened to the public in november 2022, one can add before: 2022 to all image search queries. for example: superman before:2022 would turn up images of the man of steel published online before 2022. another option is adding -ai -prompt after any search term. for example: superman -ai -prompt. using both (superman -ai -prompt before:2022) is also an option, of course.
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