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@letta-ai

Letta

Advancing the frontier of AI systems with memory

Hello World 👾

Letta Logo

Letta adds state to your LLMs to give them advanced reasoning capabilities and transparent long-term memory. You can use Letta to create powerful LLM agents that can reason about their past interactions, learn from them, and improve their behavior over time.

  • Download the Letta open source framework on GitHub
  • Try the Agent Development Environment (ADE) to build stateful agents in a no-code UI
  • Read the Letta docs to learn about the ADE, Python and TypeScript/Node.js SDKs, Vercel AI SDK integrations and more
  • Join our team and other Letta users and developers on our Discord server

Letta is made with ❤️ by our team in San Francisco (join us!) and over 100 individual contributors from around the world.

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  1. letta letta Public

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

    Python 16.8k 1.7k

  2. agent-file agent-file Public

    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.

    Python 473 28

  3. letta-chatbot-example letta-chatbot-example Public

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

    TypeScript 48 18

  4. letta-discord-bot-example letta-discord-bot-example Public

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

    TypeScript 14 2

  5. letta-node letta-no 8000 de Public

    A TypeScript SDK for accessing the Letta API

    TypeScript 17 4

  6. letta-python letta-python Public

    A Python SDK for accessing the Letta API

    Python 26 5

Repositories

Showing 10 of 16 repositories
  • letta Public

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

    letta-ai/letta’s past year of commit activity
    Python 16,760 Apache-2.0 1,742 24 39 Updated Jun 5, 2025
  • letta-python Public

    A Python SDK for accessing the Letta API

    8000
    letta-ai/letta-python’s past year of commit activity
    Python 26 5 2 2 Updated Jun 4, 2025
  • letta-leaderboard Public

    An LLM leaderboard for stateful agents

    letta-ai/letta-leaderboard’s past year of commit activity
    Python 8 2 0 0 Updated May 30, 2025
  • agent-file Public

    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.

    letta-ai/agent-file’s past year of commit activity
    Python 473 Apache-2.0 28 2 1 Updated May 24, 2025
  • letta-node Public

    A TypeScript SDK for accessing the Letta API

    letta-ai/letta-node’s past year of commit activity
    TypeScript 17 4 1 1 Updated May 22, 2025
  • .github Public
    letta-ai/.github’s past year of commit activity
    1 1 0 0 Updated May 21, 2025
  • sleep-time-compute Public

    accompanying material for sleep-time compute paper

    letta-ai/sleep-time-compute’s past year of commit activity
    Python 92 MIT 7 0 0 Updated Apr 30, 2025
  • letta-chatbot-example Public

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

    letta-ai/letta-chatbot-example’s past year of commit activity
    TypeScript 48 MIT 18 0 2 Updated Apr 29, 2025
  • create-letta-app Public

    Create Letta App lets you create apps with Letta

    letta-ai/create-letta-app’s past year of commit activity
    TypeScript 6 1 0 0 Updated Apr 28, 2025
  • letta-research-onsite Public Forked from letta-ai/letta

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

    letta-ai/letta-research-onsite’s past year of commit activity
    Python 0 Apache-2.0 1,768 0 0 Updated Apr 21, 2025
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