Claude.ai "Your message is too long" (conversation length limit)
Is there an outage right now?
Claude official status is operational. If this error persists, it is likely an implementation or environment issue on your side.
View Claude status →What this error means
The message—or the whole conversation—exceeds Claude.ai's length limit for a single turn. Because Claude re-reads the entire thread each turn, long chats eventually hit the cap.
Common causes
- •A single very long message or pasted text
- •The conversation has grown too long (full history counts each turn)
- •Large attached files or documents
- •Hitting the context window of the chosen model
How to fix
- 1.Start a new chat to reset the accumulated context
- 2.Shorten the message or split it into parts
- 3.Summarize earlier content instead of pasting it all
- 4.Remove or trim large attachments
- 5.Use Projects/knowledge for large reference material
When waiting helps (and when it won't)
This is a length limit, not an outage—waiting will not help. Start a new conversation or shorten the input.
Alternatives when Claude is down
Related errors
FAQ
What is Message/conversation too long?
The message—or the whole conversation—exceeds Claude.ai's length limit for a single turn. Because Claude re-reads the entire thread each turn, long chats eventually hit the cap.
How do I fix Message/conversation too long?
Start a new chat to reset the accumulated context / Shorten the message or split it into parts / Summarize earlier content instead of pasting it all / Remove or trim large attachments / Use Projects/knowledge for large reference material