Letta Code Letta Code
Letta Code is a memory-first, stateful agent harness designed for coding and autonomous tasks that persist and improve over time. It allows agents to maintain long-term memory, learn from experience, and adapt their own behaviors through research-backed techniques like sleep-time compute.
Launched the Letta Code desktop app in April 2026, integrated messaging channels in May 2026, and introduced Mods for harness-level self-improvement.
As of
- Persistent, self-improving memory architecture with git-based versioning
- Model-agnostic design with hot-swappable LLM support
- Skill learning system for automating and reusing complex workflows
- Multi-channel support including CLI, desktop app, web, and messaging integrations
- Remote sandbox and multi-environment execution via Letta Cloud
Developers building coding agents that need to learn project-specific patterns, conventions, and architectural history over long periods.
Users seeking plug-and-play task automation, lightweight one-shot chatbots, or those who prefer not to manage agent memory systems.
Free tier available for up to 3 managed agents with BYOK. Pro plan is $20/month for up to 20 agents with Letta Auto usage quotas. Developer API plan is $20/month base plus usage-based fees ($0.10/active agent/month, $0.00015/sec tool execution, and token costs).
A powerful, ambitious framework for long-running agents that solves AI 'amnesia,' though it requires a higher engineering commitment than standard agent tools.
Is Letta Code free?
Letta Code is Freemium. Free tier available for up to 3 managed agents with BYOK. Pro plan is $20/month for up to 20 agents with Letta Auto usage quotas. Developer API plan is $20/month base plus usage-based fees ($0.10/active agent/month, $0.00015/sec tool execution, and token costs). Check the official site for current plans.
Is Letta Code open source?
Yes - Letta Code is open source. Free tier available for up to 3 managed agents with BYOK. Pro plan is $20/month for up to 20 agents with Letta Auto usage quotas. Developer API plan is $20/month base plus usage-based fees ($0.10/active agent/month, $0.00015/sec tool execution, and token costs).
How much does Letta Code cost?
Free tier available for up to 3 managed agents with BYOK. Pro plan is $20/month for up to 20 agents with Letta Auto usage quotas. Developer API plan is $20/month base plus usage-based fees ($0.10/active agent/month, $0.00015/sec tool execution, and token costs). Pricing changes often - verify on the official site.
Who is Letta Code best for?
Developers building coding agents that need to learn project-specific patterns, conventions, and architectural history over long periods.
Who is Letta Code not ideal for?
Users seeking plug-and-play task automation, lightweight one-shot chatbots, or those who prefer not to manage agent memory systems.
What are the best Letta Code alternatives?
The closest Letta Code alternatives on ai.dosa.dev are Claude Code, Codex CLI, Amp - all listed under Terminal & CLI Agents.
Who makes Letta Code?
Letta Code is developed by Letta. It is listed in the Terminal & CLI Agents category on ai.dosa.dev.
Favorite this tool to revisit it later, or Zap it to contribute to the public vote count.
Content on this page is AI-generated. Please verify details with the vendor's website for accuracy.