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Record · lettaFrameworkCode plus model/hosting costs; Cloud account and plan limitsRecord checked Oct 28, 2026

Letta (formerly MemGPT)

Stateful agents and persistent memory tooling with Cloud, CLI and SDK interfaces.

Visit Letta (formerly MemGPT) →View repository

Documentation reviewed

Can I use this for my work?

Checked · Recheck due

Letta's current Desktop is the signed-in Cloud web app installed as a PWA. The previous native Letta Code Desktop stopped running after its October 12 deprecation.

Availability
Available. Current web/PWA and CLI interfaces available. The April native desktop launch is historical and is not a current download recommendation.
How to use it
Web app; Desktop app; Library / CLI; API. Web/PWA in supported browsers; local agents use the CLI, SDK or a custom UI. PWA installation differs by browser and OS.
Processing and data
Self-hosted option; Vendor cloud; Local and cloud options. The PWA requires a Cloud account; the CLI's default local backend stores state locally without login. Inference depends on connected providers or local servers; optional login backs agents up to Cloud.
Costs and limits
Code plus model/hosting costs; Cloud account and plan limits
Outputs
Stateful agent sessions, editable memory and proposed coding/tool actions; persistence is not proof that remembered facts are correct.

Use the CLI, SDK or a custom App Server UI for local agents. A local agent backend does not establish local model inference. Provider accounts, plans and usage terms remain separate.

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Publisher documentation was reviewed. ASE has not independently tested this workflow, its outputs, billing, privacy controls or accessibility.

Best for

Developers building stateful assistants with inspectable memory across sessions and configured interfaces.

Avoid if

You require the retired native Letta Code Desktop app or assume the current Desktop PWA works without a Cloud account.

About Letta (formerly MemGPT)

Letta, formerly MemGPT, provides stateful agent and persistent-memory tooling through Cloud, CLI, SDK and App Server interfaces. The current Letta Desktop is the signed-in Cloud web app installed as a PWA. The previous native Letta Code Desktop was deprecated October 12, 2026 and no longer runs. Local agents use the CLI, SDK or a custom App Server UI; a local agent backend does not establish local model inference. Model-provider and hosting terms remain separate.

Letta (formerly MemGPT) is listed in this index, with 25k stars on GitHub. Its latest recorded repository push was in October 2026; that is not an ASE editorial review date.

Install

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