5 hrs
Rolling usage window
All plans use a 5 hour rolling window. When you send your first message, the window starts. It resets when you message again after the 5 hours lapse.
1
Window starts
When you send your first message, a 5 hour window begins
2
Messages draw from pool
All messages during that window draw from your plan's quota
3
Window resets
The window resets when you send your next message after the 5 hours lapse
4
Model matters
Using Opus consumes more of your quota than Haiku or Sonnet
Approximate messages per 5 hours (Opus model)
~45
Pro
$20/month
~225
Max 5x
$100/month
~900
Max 20x
$200/month
Why are these numbers approximate?
Your actual message count depends on how long each conversation is. Longer conversations use more processing capacity per message, so a fresh conversation gets more messages than one that has been going for a while. Switching to a lighter model like Sonnet or Haiku also stretches your quota further.
Approximate messages per 5 hours by plan (using Opus)
Tips for managing usage
- Use the right model for the task: Sonnet for most everyday tasks, Opus for complex reasoning and high stakes work.
- Combine questions into single messages instead of sending many short messages.
- Store frequently referenced documents in Projects instead of re uploading them every conversation.
- Plan intensive work around your 5 hour windows.
- Start new conversations for new topics to minimize context window size.
- Consider Max 5x ($100/mo) if you regularly hit limits on Pro.
Extra usage opt in
If enabled in Settings, you can continue working past the limit at standard API pricing rates. You will see a notification and must choose to continue; it is not automatic.
2x usage promotion
As of March 2026, Anthropic is running a 2x usage promotion that doubles the message limits across paid plans. Check the Claude app or pricing page for current availability, as this may be temporary or evolve into a permanent increase.