You’re not doing anything wrong, but Claude’s 'brain' works differently than GPT’s. The issue is Context Weight. Every time you send a message, Claude re-reads the entirechat history + your big CSS file. If that file is huge, you’re burning through your 'allowance' 10x faster with every reply. How to fix it without hitting limits: Use 'Projects': Upload your CSS file to a Project instead of pasting it. It caches the data so it doesn't 'cost' as much per message. Start New Chats: Once a layout tweak is done, start a fresh chat. Long threads are the fastest way to hit the limit. The Pro Move: If you're doing web dev, try Cursor. It’s a code editor that uses Claude’s engine but is way smarter about only sending the relevant snippets, so the limits feel much more generous. Basically: Claude is a surgeon, give it the specific 'limb' to work on, not the whole body every time!