Three Memory Systems Under One Login. Stop Picking Sides.

Anthropic now ships at least three different memory models inside the Claude product family, and they don't behave the same way. Claude.ai has a chat memory feature for Pro, Max, Team, and Enterprise users that summarizes prior conversations and injects that summary into new chats. Claude Code has CLAUDE.md files plus a separate "auto memory" directory the model writes to itself, both loaded at session start. The API ships a memory_20250818 tool that hands a /memories directory to your applicati