Wait for the rate limit to reset (usually 1-3 hours), upgrade to ChatGPT Plus for higher limits, or reduce your message frequency.
Rate limits are temporary. Wait 1-3 hours before trying again.
Plus subscribers get significantly higher usage limits and priority access during peak times.
If you're sending many messages in quick succession, try spacing them out.
For heavy usage, consider using the OpenAI API which offers more granular rate limit controls and higher throughput.
ChatGPT · Usage Limits & Restrictions
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ChatGPT Plus ($20/month) in 2026 gives approximately 160 GPT-5.5 messages per 3-hour rolling window. GPT-4o was retired from ChatGPT in February 2026 and replaced by GPT-5.5 as the default model. o1 is limited to roughly 50 messages per week, o3-mini to 50 per day. When you hit the cap, ChatGPT falls back to a lighter model automatically.
ChatGPT temporarily restricts accounts after approximately 5–10 failed login attempts within a short period as a brute-force protection measure — the automatic cooldown typically lasts 15–30 minutes. Stop all login attempts immediately, wait at least 30 minutes, then try once from an incognito window on a clean network without a VPN.
ChatGPT Plus allows approximately 160 GPT-4o messages per 3-hour rolling window before automatically downgrading you to GPT-4o mini. Free users get roughly 10–15 GPT-4o messages per 3-hour window. The cap resets on a rolling basis — not at midnight — meaning if you sent your first message at 2 PM and hit the limit, you regain access around 5 PM, not at midnight. Switch to GPT-4o mini immediately to keep working while you wait.
ChatGPT is available in over 160 countries, but specific features — including Advanced Voice Mode, DALL-E image generation, and some GPT Store capabilities — roll out region by region and may not be available everywhere simultaneously. Check openai.com/policies/usage-policies for the current list of restricted countries and features before assuming the issue is account-specific.
ChatGPT temporary restrictions typically last 1–24 hours and are triggered by behaviors that look automated: rapid retries, frequent IP changes, VPN switching, or many failed logins within a short window. Stop retrying immediately, clear your session, disable VPN, and wait at least 30 minutes before attempting a clean sign-in from a stable network.
ChatGPT's context window limit is approximately 128,000 tokens for GPT-4o — roughly 100,000 words of combined input and output. When you hit 'request too large,' your conversation history plus your new message exceeds this limit. The fix is to start a new conversation and paste only the relevant context, rather than continuing in a thread that has grown too long.