Why Is ChatGPT So Slow? Where the Wait Comes From and How to Cut It

ChatGPT delays can originate in the browser, local network, or OpenAI’s servers, and comparing the same prompt on a computer and a phone using mobile data can help isolate the cause. The text recommends checking OpenAI’s status page for service incidents before changing local settings, while browser-specific remedies include reloading memory-heavy tabs, using incognito mode, disabling extensions, clearing site data, and trying another browser. Tests described in the text found that very long conversations did not substantially slow model response generation but could make an open browser tab consume significant memory, while long chats may also exceed a model’s context window and lose earlier details. Response time is further influenced by selected model and reasoning modes, peak demand, and the greater processing requirements of image generation. For recurring long-document tasks, the text suggests using an API with streamed responses to avoid browser-page overhead and start each request with a controlled, clean context.

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