Why Do LLM Chatbots Still Lose the Conversation After a Few Turns?

LLM-powered chatbots have improved dramatically, but maintaining a useful conversation over many turns still seems surprisingly difficult.

Once conversations become longer, we often start seeing problems such as:

  • Important context being forgotten
  • Irrelevant conversation history consuming tokens
  • Hallucinations increasing as context grows
  • User preferences being inconsistently remembered
  • Retrieval returning technically relevant but contextually wrong information
  • Latency and inference cost increasing
  • Multilingual conversations losing meaning between turns

I’m curious how people here are handling conversation memory in production AI assistants.

Are you mainly using:

  • Sliding-window conversation history?
  • Summarization-based memory?
  • Vector database retrieval?
  • Structured user/session memory?
  • Long-context models?
  • A hybrid approach?

And perhaps more importantly: how do you evaluate whether an AI assistant actually remembers the right information rather than simply remembering more information?

Would love to hear what architectures or Hugging Face models/tools people are successfully using in production.