Letta Code: A Memory-First Coding Agent for Persistent Learning Across Sessions
By
ascorbic
The bagel they save for the regulars. Don't skim, savour.
Summary
Letta Code is a memory-first coding agent designed for long-lived, persistent AI agents that learn and improve across multiple sessions rather than operating in independent sessions. It's a model-agnostic open-source harness that ranks #1 on the TerminalBench coding benchmark and achieves performance comparable to proprietary solutions from major LLM providers like Claude Code, Gemini CLI, and Codex CLI.
Key quotes
· 4 pulledLetta Code is a memory-first coding agent, designed for working with agents that learn over time.
Rather than working in independent sessions, each session is tied to a persisted agent that learns.
Letta Code is also the #1 model-agnostic OSS harness on TerminalBench.
Letta Code achieves comparable performance to harnesses built by LLM providers (Claude Code, Gemini CLI, Codex CLI) on their own models.
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