Record · lettaFrameworkOpen sourceVerified Sep 23, 2026

Letta (formerly MemGPT)

Stateful agents with persistent memory that learn and improve over time, formerly MemGPT.

Visit Letta (formerly MemGPT) →View source

Sources and review

Checked against public documentation on September 23, 2026. Suitability guidance is our editorial judgment; this is not a performance benchmark or an endorsement.

Best for

Assistants that need long-term, self-editing memory rather than a fresh context each session.

About Letta (formerly MemGPT)

Letta, formerly MemGPT, builds stateful agents whose memory persists and improves across sessions. Current development lives in letta-ai/letta-code, which contains the agent harness, terminal UI, App Server and channel integrations; agents are also available through desktop apps, a web app, Slack, Telegram and Discord, a TypeScript Agent SDK and Letta Cloud. This repository keeps the project's history.

Letta (formerly MemGPT) is an open-source project, with 25k stars on GitHub. It was last updated in September 2026.

Install

npm install -g @letta-ai/letta-code

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