LLMs work using context windows, which represent how much input an LLM can process at once. Claude 4, the LLM Memex uses, has a context window of 200k tokens, with ability to go to 1M tokens in Long Context Mode.
You can see how much of context window a conversation is using in the usage indicator at the bottom right of the app:
If you ever get close to reaching the model's context window limit, Memex's Context Management capabilities will kick-in, helping you start a new conversation without missing a beat!
