CHATGPT GUIDE

ChatGPT token limit explained

ChatGPT conversations do not have unlimited working memory. Every model has a token limit, the maximum amount of text it can hold in one conversation, and once a long thread approaches it, older details stop shaping new replies. Here is what the limit is, when you will actually feel it, and how to keep going without losing your work.

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What the token limit actually is

A token is roughly three quarters of a word, and the limit counts the entire conversation, your prompts, ChatGPT's answers, and anything you pasted in. The ceiling depends on the model: GPT-3.5 holds around 16,000 tokens, while GPT-4o holds around 128,000, roughly 96,000 words. Higher-tier plans give access to the larger windows, but every model still has a cap.

Symptoms you are hitting it

  • Earlier decisions quietly disappear from the conversation.
  • Ideas you already rejected come back around.
  • The thread slows down or responses get less precise.
  • ChatGPT itself suggests starting a new chat.

How to keep going

  • Ask ChatGPT to summarise everything so far: the goal, key decisions, outputs produced, and what still needs doing.
  • Open a new chat and paste that summary as your first message, so the fresh window starts with the useful context and none of the bloat.
  • For work with code or documents, paste the latest version of each output directly into the new chat.
  • To skip the manual step, use thredly to capture the summary automatically as you work.

Why a fresh chat beats fighting the limit

A new conversation resets the token count, but only a focused handover keeps it useful. Pasting a structured summary gives the new chat the decisions and current state without dragging the entire transcript back in, which would just refill the window. Done well, the fresh chat understands more than the bloated one did.

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Frequently asked questions

Does a fresh chat reset the token limit?

Yes, each new conversation starts with a full, empty window. The catch is that it also starts with no context, so a structured summary is what makes the reset worthwhile.

How big should my handover summary be?

Big enough to carry the goal, decisions, outputs, and next steps, small enough to paste without refilling the window. Around 200 to 400 words usually works.