Claude Pro Limits: What You Actually Get for $20

• Two meters run at once: a rolling 5-hour session window and a weekly cap. Hitting either one stops you until it resets.
• The 5-hour window opens with your first message and resets about five hours later — not at fixed clock times.
• Weekly limits track Opus-class usage separately from everything else, each with its own reset shown in Settings → Usage.
• claude.ai chat and Claude Code draw from the same allowance. A heavy Claude Code session eats your chat budget too.
• Consumption is compute-based, not message-count-based: a short question in a fresh chat costs a fraction of a long prompt with files at the end of a 100-message conversation.

The limits, itemized

Figures marked derived are our arithmetic on official statements, not published numbers.

Which models you get

• Start a new conversation for a new topic. Claude re-reads the entire chat on every message, so a long-running thread can cost 10x what fresh chats would.
• Keep Sonnet 5 as your daily driver and save Opus 5 for the tasks that need it — the Opus weekly bucket is the one heavy users hit first.
• Big attachments count every message, not once. Extract the pages you need instead of re-sending a 200-page PDF.
• Check Settings → Usage before a long session — it shows both meters and their exact reset times.
• If you hit weekly caps on Claude Code more than occasionally, the $100 Max 5x tier is priced almost exactly at the crossover point.

Keep deciding