Letta ORG

Stateful agents that are like people, with memory, identity, and the ability to learn and adapt

The SDK interface to Letta Code. Build deeply personalized agents with persistent memory that learn over time.

Archived - has been replaced by Letta Code channels/schedules!

An open-source demo UI built on top of the Letta Code SDK

A shared repository for skills. Intended to be used with Letta Code, Claude Code, Codex CLI, and other agents that support skills.

Agent File (.af): An open file format for serializing stateful AI agents with persistent memory and behavior. Share, checkpoint, and version control agents across compatible frameworks.

Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.

Give Claude Code a subconscious

accompanying material for sleep-time compute paper

An example chatbot application built on the Letta API, which makes each chatbot a stateful agent (agent with memory) under the hood.

Viva la machina.

A powerful Obsidian plugin that integrates with Letta to provide a stateful AI agent that knows your vault contents and remembers your conversations

Evaluation kit for testing stateful agents

A Python SDK for accessing the Letta API

A TypeScript SDK for accessing the Letta API

An experimental SDK for adding agentic memory and learning in a pluggable way

Drop-in SDK for adding continual learning and long-term memory to any LLM agent.

An example Discord chatbot built on the Letta API, which uses a stateful agent (agent with memory) under the hood.

A curated list of awesome Letta projects, tools, tutorials, and resources for building stateful AI agents with persistent memory.

An example of stateful AI agent powered by Letta and Gemini 3 pro.

Open-source deep research agent implemented with Letta

Recovery-Bench is a benchmark for evaluating the capability of LLM agents to recover from mistakes

Chat with your Letta agents over a low-latency voice connection. Advanced voice mode, but with advanced memory.

A unified CLI to connect artificial intelligence to the social web.

A Modal application for serving a Letta agent on Telegram.

An LLM leaderboard for stateful agents

letta integration for terminalbench (#1 open source agent, in under 200 lines of code)

Example CharacterAI-style web app that runs on Letta to create characters with memory.

The official Vercel AI SDK provider for Letta - the platform for building stateful AI agents with long-term memory. This provider enables you to use Letta agents seamlessly with the Vercel AI SDK ecosystem.

Your thinking partner.

Create Letta App lets you create apps with Letta

This is the official n8n node that allows you to integrate Letta AI agents into your n8n workflows.

Integrate Letta Code into your GitHub repo to review issues, code, and more

Letta Code mod packages and examples

Deploy a Letta Code app server to any cloud platform

Tutorial notebooks for Letta

Every letta web client in a monorepo

A viewer for a multi-agent chat room, powered by ATProto.

Example text-to-sql agent using Motherduck (DuckDB)

Ezra's house.

No description.

A benchmark for LLMs on complicated tasks in the terminal

No description.

Harbor is a framework for running agent evaluations and creating and using RL environments.

The memory-first coding agent

Letta ❤️ Flask

Letta (formerly MemGPT) is the stateful agents framework with memory, reasoning, and context management.

Migration examples for moving Letta Agent SDK v1 integrations to v2

A sanitized version of Ezra's context repository.

The memory-first coding agent

The memory-first coding agent

No description.