DeepSeek keeps showing "server busy" mostly because of compute contention during peak hours — a capacity problem on the official side, not your network or your account. If you need to keep working right now, the fastest fix is to turn off DeepThink and switch to the base model as a stopgap; if you're not in a hurry, come back outside the evening peak and things will usually be back to normal.
Why "server busy" almost always happens at peak hours
DeepSeek's DeepThink is a reasoning model: every answer involves heavy chain-of-thought inference, and a single request consumes several times the compute of an ordinary chat. Weekday daytime and 8–11 PM are the busiest windows; when huge numbers of requests flood in at once, server compute can't keep up, so requests queue up and get throttled, and the frontend shows "server busy". This is a server-side capacity issue: at the same hour, other users are almost certainly stuck too, so switching Wi-Fi or rebooting your router won't help — don't waste effort on local fixes yet.
Step 1: Turn off DeepThink to stay usable
When congested, DeepThink is the first thing to get throttled because it hogs the most compute. The emergency fix is simple: find the "DeepThink" toggle near the input box and switch it off, then continue chatting with the base model. The base model responds fast and handles everyday questions perfectly well; it's just less thorough than DeepThink on complex reasoning, long code, or math derivations. Once the peak passes, turn the toggle back on — no need to log in again, and your chat history stays intact.
Step 2: Use off-peak hours, and open a new window for long chats
If it's still stuck with DeepThink off, overall compute is maxed out, and timing is everything. Avoid the 8–11 PM evening peak; mornings and late nights are usually the smoothest. One easily overlooked detail: the longer a single chat window gets, the longer its context, the more compute each request burns, and the more likely it is to hit throttling. Ask important questions in a fresh window and your success rate will noticeably improve. Also, stale session state cached in the browser can occasionally jam retries — clear the cache, or switch browsers / open an incognito window, and that often gets around it.
Step 3: Check the official status page before wasting effort
Before retrying over and over, check DeepSeek's official status page for announcements. If the official team is doing maintenance, upgrades, or announced throttling, no local action will help — wait for the all-clear, which is the biggest time-saver. Only when the status page shows everything normal but you're the only one who can't connect is it worth digging further: switch networks (e.g., tether to your phone), change DNS, or wait half an hour and try again.
In these two cases, tinkering won't help — just wait
First, when the official status page has announced maintenance or throttling — refreshing the page or reinstalling the app changes nothing. Second, when the evening peak has just begun and you must use DeepThink for complex reasoning — accept the queue; repeatedly closing and reopening may lose your place in line, so let the request work its way through. Remember one rule of thumb: official-side problems can only be waited out; on your side, the moves you control are turning off DeepThink, going off-peak, clearing the cache, and opening a new window.
