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Chat FAQ

Messages won’t send / a red circle appears?

This may be caused by one of the following:

  • Frequency limit triggered: Kimi has a conversation limit within a given period. Sending messages too frequently in a short time may prevent you from continuing. We recommend trying again after 2–3 hours and keeping your message frequency under control.
  • Poor network conditions: If your mobile signal is weak or the network is unstable, messages may fail to send. Try switching to another network and sending again.

What if a chat exceeds 200,000 Chinese characters?

The single-turn context limit is about 128K token (roughly 50,000–60,000 Chinese characters). Once the limit is reached, the model can no longer read in new content. We recommend:

  1. Start a new chat: Copy the key conclusions or outline from the original chat into a new chat to continue.
  2. Generate a handoff document: Ask Kimi to “summarize and generate a handoff document,” then paste it into a new chat as the initial context. This reduces the word count while preserving the key information.

Tip:

  • Deleting earlier messages in the same chat will not free up the context window. Please start a new chat instead.
  • Because Thinking models use more token for reasoning, their context limit is smaller. When working with long documents, choose K2 instead of K2-Thinking.

Seeing the “Let’s switch topics” prompt?

This prompt means the current content has triggered the safety policy, so the current topic cannot continue. Simply enter a new topic to restart the conversation; no waiting is needed. If you believe the content does not violate any rules, click “👎” to send feedback and help us improve the safety policy.

Getting the reply “Kimi is a little tired”?

Too many users are online at the moment, and computing resources are under pressure. This is peak-hour rate limiting. Please wait 1–2 minutes and try again. To reduce waiting, you may consider subscribing to a membership plan, which provides priority access to a dedicated computing channel.

Why can’t I download PPT/Word/Excel files from a chat?

The Kimi chat window itself does not generate downloadable Office files:

  • To generate a PPT, go to PPT Assistant, where online generation and download are supported.
  • To generate Word or Excel files, please use Agent.