Pi Coding Agent

Pi Coding Agent is a free, open-source a terminal-based coding use that connects to 15+ AI providers. You can swap models mid-session, build custom workflow extensions, and automate coding tasks without vendor lock-in.

Features:

• •Multi-model switching swap between Anthropic, OpenAI, Google, Azure, Bedrock, Mistral, Groq, Cerebras, xAI, Hugging Face, Ollama, and more without restarting your session.
• •Extension system install community-built packages from pi.dev/packages or create your own skills and prompt templates to customize agent behavior for your project.
• •Four operational modes run Pi in interactive TUI mode, print/JSON mode for scripting, RPC mode for integrations, or SDK mode for programmatic control.
• •Git workflow automation automate commit and push processes directly from the terminal so routine version control tasks run on autopilot.
• •MCP support connect external tools and data sources via the Model Context Protocol for deeper integration with your development environment.
• •Browser extension use Pi's browser extension to bring the coding agent into web-based workflows alongside your terminal sessions.
• •Local model support run models entirely offline using Ollama, so you can code without sending data to third-party cloud providers.
• •Lightweight terminal UI Pi stays minimal by design, skipping heavy features like built-in sub-agents and plan mode in favor of a fast, tree-structured TUI you extend yourself.

Pricing:

• •Free Pi is completely free to use. You supply your own API keys from providers like OpenAI, Anthropic, or Google. Local models via Ollama cost nothing. There are no subscription tiers or usage caps from Pi itself.

Limitations:

• •Requires terminal proficiency Pi runs exclusively in the terminal. Users who are not comfortable with CLI environments will face a steep learning curve compared to GUI-based tools like Cursor.
• •No built-in GUI there is no desktop app or web interface. All interaction happens through the TUI, which limits accessibility for non-technical users.
• •DIY extension building creating custom extensions and skills requires understanding prompt templates and the extension architecture. The community package library is still growing.
• •API costs are separate Pi is free, but you pay LLM provider costs directly. Heavy usage across multiple providers can add up quickly depending on model pricing.