Letta Agent
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Introduction
Letta is an AI research lab building self-improving agents with persistent memory, identity, and continual learning.
Listed on
September 19, 2026
What is Letta Agent?
Letta is an AI research lab in San Francisco building machines that learn. Its research ships as software: Letta Agent, a self-improving AI agent whose memory, identity, and capabilities evolve with experience. The work builds on MemGPT and focuses on memory models, context management, and continual learning.
How to use Letta Agent?
- Install the Letta Code CLI globally with npm: npm i -g @letta-ai/letta-code. Then use Letta Agent to build agents whose memory, identity, and capabilities evolve with experience.
Core features of Letta Agent
- Self-improving AI agent with evolving memory, identity, and capabilities
- Memory models trained with memory-native RL
- Context Constitution principles for managing agent context
- Context Repositories: git-based memory and versioning
- Continual learning in token space
- Sleep-time compute for offline reasoning
- MemGPT-based virtual context management
- Letta Code CLI installable via npm
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