The message, and what it means
The message says something like: "This conversation has reached its maximum length, but you can keep talking by starting a new chat."
Every time ChatGPT replies, it re-reads the whole conversation: your questions, its answers, every passage you pasted in. All of it has to fit in a fixed space. Once the chat outgrows that space, there's no room for a new message, so ChatGPT stops.
Nothing is deleted. You can still scroll, read and copy the old chat. You just can't add to it. So the job isn't to rescue that chat, it's to carry what matters into a new one.
This is a common spot to be in. In a survey of Canadian post-secondary students run by Academica Group in February 2026, ChatGPT came first among the tools used for coursework: 85% of students who use AI for their courses said they use it, well ahead of Gemini (32%) and Copilot (20%).
"It happens sooner than before": what we know
Since October 4, 2026, users on OpenAI's community forum have reported that their conversations reach the maximum length much sooner than they used to, some after far fewer messages than before. On October 18, OpenAI's support team replied in the thread that it was "looking into whether this is a widespread issue or something account-specific."
That's where things stand: reports from users, and a reply saying OpenAI is looking into it. OpenAI hasn't announced a change to the length limit. Whatever the cause, the way forward is the same: a new chat that starts with what matters.
What a new chat needs to pick up your assignment
Two moves rarely work. Starting cold means retyping the assignment from memory: you'll get the topic right and lose the details, like the citation style or the point your instructor asked you to fix. Pasting the whole old chat brings back the same bulk that filled the first one.
A new chat needs much less:
- The assignment, in one or two lines, with its requirements: length, format, citation style.
- What's settled: your thesis or main question, the structure you chose, what you dropped and why.
- Your rules: the tone, the level, and what you asked the AI not to do, for example "don't write it for me, ask me questions".
- Where you stopped: the section you were on, or the latest version of your outline.
Check your course's rules first.
Whether you can use AI for an assignment, and how, depends on your course. Read the instructions for the specific course and assignment. If you're not sure, ask. And keep the old chat: if your instructor asks how you used AI, it's your record. More on that: is AI allowed in my course?
Write the handoff yourself
A handoff is a short first message for the new chat. Fill in this template and send it first:
I'm continuing work from an earlier chat on an assignment. Everything below is settled, so don't ask about it again. ASSIGNMENT: [course, topic, length, format, citation style] SETTLED: - [thesis or main question] - [structure] - [what I dropped, and why] RULES TO KEEP: - [e.g. Don't write paragraphs for me. Ask questions and point out weak spots.] WHERE I AM: [the section I'm on, or my latest outline] Continue from here. Be direct, no recap.
Keep the rule about what the AI should and shouldn't do. It's the one people forget to carry over, and a new chat won't know it.
The faster way: let Uncook write it
Going back through a long chat to find every decision is the slow part. Uncook's Handoff does it for you. On the ChatGPT page, click the Uncook icon: it picks up the chat, even one that hit the limit. Pick Handoff. You get a prompt with your goal, what's decided, the rules you set and where you stopped.
Read it, change what you want, then copy it into a new chat.
It works the same way for chats in Claude, Gemini, Perplexity, Mistral Vibe (ex-Le Chat), Gemini Notebook and Google AI Studio. Want a copy of the old chat as a file too? Export saves it as PDF, Markdown or plain text, in your browser.
Questions people ask
Did OpenAI shorten the maximum length? Not that OpenAI has said. Users have reported hitting the limit sooner since early October 2026, and OpenAI's support replied that it was looking into whether the issue was widespread or account-specific. Until OpenAI says more, those are reports, not a confirmed change.
Will I lose my work if I start a new chat? No. The old chat stays in your history, and you can still open, read and copy it. You just can't add messages to it.
Does Uncook write my assignment? No. Handoff writes the first message for a new chat, from what's already in yours. The assignment is still your work, within the rules of your course.
Start fresh,
without starting over.
Add to Chrome
We don't keep the conversations you bring. When you click Send to Uncook in the extension window, the extension sends the chat from your tab to our servers, encrypted, for up to 30 minutes, and we delete it as soon as your Uncook page opens it. What Uncook makes from it is kept as a task, for as long as our Privacy page says. Neither your chats nor your tasks are used to train AI models.