Plandex
Plandex is an open-source command-line tool for AI-assisted coding, built by Plandex. Plandex's verified model list is still being expanded, so this page emphasizes runtime shape, pricing, and comparable AI coding harnesses. It's free and open source. Engineers run it from a terminal, where it can inspect repositories, edit files, call tools, and drive repeatable agentic coding workflows across local projects.
Overview
Open-source CLI coding agent designed for large-scale, multi-step tasks with explicit planning stages and reliable multi-file changes across large codebases.
Compare Plandex side-by-side with other CLI, IDE, cloud, and framework agents on pricing, model coverage, and release cadence.
Best LLMs for this agent
Pricing and Provider Comparison
Hosted agents expose plan pricing. Bring-your-own-key agents pass the main cost through the model provider route you configure.
Featured Model Specs
Model Compatibility Matrix
Underlying Models
Compare to Similar Harnesses
FAQ
What is Plandex?
Plandex is an open-source command-line tool for AI-assisted coding, built by Plandex. Engineers run it from a terminal, where it can inspect repositories, edit files, call tools, and drive repeatable agentic coding workflows across local projects. It is primarily used for agentic coding from a local shell.
How much does Plandex cost?
Plandex is free and open source. You pay only for the underlying model API usage.
Is Plandex open source?
Yes, Plandex is open-source software.
What are alternatives to Plandex?
Alternatives include MiMo-Code, Mistral Vibe, and OpenAI Codex CLI.