How to Stop ChatGPT From Thinking on the Web, Your Phone and the API

The guide explains how users can reduce or disable ChatGPT’s visible reasoning behavior across web, mobile, and API interfaces, describing controls that vary by subscription plan and platform. It says Plus and Pro users can select an Instant setting through a Thinking slider, while Free and Go users receive fast responses by default unless they manually enable a Think option; Business users may also need to disable a Higher intelligence setting. It notes that Instant mode may still invoke reasoning for safety-related cases, and that prompt phrases such as “think harder” no longer change the selected reasoning level. For developers, it describes using the GPT-6 Luna model through Atlas Cloud with a reasoning_effort value of none to eliminate reasoning tokens on individual API requests, potentially reducing output-token costs. The guide also outlines renamed reasoning levels, recommends using higher settings only for complex work, and suggests stopping and resending stalled requests at a lower level rather than refreshing the page.

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