ChatGPT prompts "Abnormal activity detected/Login anomaly"? Causes and solutions

<p><span style="color: rgb(51, 51, 51);">When logging in from multiple locations, sharing accounts with a team, or frequently changing networks, many users encounter the following prompts:</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">● "We detected unusual activity"</span></p><p><span style="color: rgb(51, 51, 51);">● "Your account is temporarily restricted"</span></p><p><span style="color: rgb(51, 51, 51);">● "Suspicious activity detected, usage temporarily restricted"</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">Common phenomena include:</span></p><p><span style="color: rgb(51, 51, 51);">● Frequent CAPTCHA or mobile phone verification required</span></p><p><span style="color: rgb(51, 51, 51);">● Automatic logout</span></p><p><span style="color: rgb(51, 51, 51);">● Slower GPT responses, logical inconsistencies</span></p><p><span style="color: rgb(51, 51, 51);">● Restricted content generation, Pro/GPT-4 permissions temporarily unavailable</span></p><p><span style="color: rgb(51, 51, 51);">● Plugins or file upload functions locked</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">While these problems may seem minor, if left unaddressed, they can lead to account bans or permanent functional restrictions. Below, w</span><strong style="color: rgb(51, 51, 51);">e analyze the causes and provide feasible solutions.</strong></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h2><span style="color: rgb(26, 26, 26);">I. Why do abnormal login or suspicious activity prompts occur?</span></h2><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h3><span style="color: rgb(26, 26, 26);">1. Account usage environment is deemed abnormal</span></h3><p><span style="color: rgb(51, 51, 51);">OpenAI is very sensitive to account sharing. If the usage environment appears "abnormal," the system may assume the account is shared by multiple people, triggering a "suspicious activity" prompt.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">Common scenarios include: s</span><strong style="color: rgb(51, 51, 51);">imultaneous logins from different devices in different regions, frequent IP address switching (especially across borders), and multiple logins from different IPs within a short period</strong><span style="color: rgb(51, 51, 51);">. These can all mislead the system into believing that the account is being used by multiple people in rotation, even if only you are actually operating the system.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h3><span style="color: rgb(26, 26, 26);">2. Unclean or High-Risk IP</span></h3><p><span style="color: rgb(51, 51, 51);">IP issues are also a major cause of account restrictions.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">If the data center IP used </span><strong style="color: rgb(51, 51, 51);">has been used by multiple people, blocked, or belongs to a low-quality node</strong><span style="color: rgb(51, 51, 51);">, OpenAI will directly classify it as high-risk. Additionally, frequent IP changes, frequent cross-regional switching, or multiple users logging in from the same IP will also make the system think you are engaging in abnormal operations. Furthermore, some Asian IPs are inherently more risky and more likely to trigger restrictions.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h3><span style="color: rgb(26, 26, 26);">3. Temporary Demotion or Restriction</span></h3><p><span style="color: rgb(51, 51, 51);">Furthermore, if your account operates frequently, such as</span><strong style="color: rgb(51, 51, 51);"> frequently calling APIs, generating content in batches, or using automated scripts or plug-ins</strong><span style="color: rgb(51, 51, 51);">, the system may temporarily demote your account, causing GPT to slow down or permissions to be restricted—this is known as "demotion."</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h3><span style="color: rgb(26, 26, 26);">4. Abnormal Browser/Device Fingerprints </span></h3><p><span style="color: rgb(51, 51, 51);">Abnormal browser and device fingerprints can also trigger warnings.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">OpenAI detects changes in browser UA, Canvas, WebGL, font differences, and even timezone, language, and device ID. If t</span><strong style="color: rgb(51, 51, 51);">hese parameters are inconsistent</strong><span style="color: rgb(51, 51, 51);">, the system may determine that you are accessing the site under abnormal conditions, thus restricting your account.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h2><span style="color: rgb(26, 26, 26);">II. How to Resolve This?</span></h2><h3><span style="color: rgb(26, 26, 26);">1. Check for Violations</span></h3><p><span style="color: rgb(51, 51, 51);">Make sure your actions </span><strong style="color: rgb(51, 51, 51);">comply with OpenAI's usage guidelines</strong><span style="color: rgb(51, 51, 51);">.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">Do not share your personal account with multiple people, and do not abuse it through mass automation. API usage must be compliant. Even with a clean IP address, violations will not prevent account restrictions.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h3><span style="color: rgb(26, 26, 26);">2. Restore Your Account</span></h3><p><span style="color: rgb(51, 51, 51);">Reduce risk through account recovery procedures.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">It is recommended to immediately </span><strong style="color: rgb(51, 51, 51);">change your ChatGPT account password and enable two-factor authentication (2FA) to enhance security</strong><span style="color: rgb(51, 51, 51);">. Simultaneously, select "Logout from all devices" in settings to disconnect all potentially problematic login environments at once, and clear your browser cache, cookies, and DNS to ensure a clean access environment.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h3><span style="color: rgb(26, 26, 26);">3. Use a Stable, High-Quality Proxy IP</span></h3><p><span style="color: rgb(51, 51, 51);">The most crucial aspect of long-term stable ChatGPT use is </span><strong style="color: rgb(51, 51, 51);">choosing a high-quality, reliable proxy IP.</strong></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">For example, </span><strong style="color: rgb(51, 51, 51);">using residential IPs provided by B2Proxy offers Static residential IPs</strong><span style="color: rgb(51, 51, 51);"> that are not shared with others. These IPs support regions officially recognized by OpenAI, such as the US and Singapore, and offer stable, fast, and low-latency connections. High-quality IPs effectively reduce the probability of being mistakenly flagged as abnormal access by the system, while free or cheap proxies are often easily marked as high-risk and are not recommended.</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><h2><span style="color: rgb(26, 26, 26);">III. Summary</span></h2><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">While ChatGPT's "Abnormal activity detected/login anomaly" message is annoying, it can usually be resolved through a systematic approach. </span><strong style="color: rgb(51, 51, 51);">The core issues lie in IP quality and usage habits.</strong></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">✅ </span><strong style="color: rgb(51, 51, 51);">Use high-quality static residential IPs from B2Proxy</strong></p><p><span style="color: rgb(51, 51, 51);">✅ Comply with OpenAI's Terms of Service</span></p><p><span style="color: rgb(51, 51, 51);">✅ Simulate normal user operations</span></p><p><span style="color: rgb(51, 51, 51);">&nbsp;</span></p><p><span style="color: rgb(51, 51, 51);">By using the above methods, you can use ChatGPT safely and stably, reducing the risk of account restrictions while ensuring full functionality and access speed.</span></p>