OpenPencil
OpenPencil is an open-source agent framework for AI-assisted coding, built by OpenPencil (released 2026-02). OpenPencil'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. Developers import it as a library to build custom agents, wire model calls to tools, and standardize LLM ops across internal automation.
Overview
Open-source AI-native vector design editor with MCP, headless CLI, Figma-compatible files, and agent skills for coding agents to inspect, modify, and export designs.
Compare OpenPencil 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 OpenPencil?
OpenPencil is an open-source agent framework for AI-assisted coding, built by OpenPencil (released 2026-02). Developers import it as a library to build custom agents, wire model calls to tools, and standardize LLM ops across internal automation. It is primarily used for LLM ops, custom agent orchestration, and repeatable automation.
How much does OpenPencil cost?
OpenPencil is free and open source. You pay only for the underlying model API usage.
Is OpenPencil open source?
Yes, OpenPencil is open-source software.
When was OpenPencil released?
OpenPencil was released in 2026-02.