Yes. This is the basic Pi setup:

curl -fsSL https://pi.dev/install.sh | sh
pi

Then inside Pi:

/login
/model

Or npm install:

npm install -g @mariozechner/pi-coding-agent
pi

Useful config files:

~/.pi/agent/AGENTS.md # global instructions
./AGENTS.md # project instructions
~/.pi/agent/settings.json # global settings
./.pi/settings.json # project settings

Optional packages:

pi install npm:pi-web-access
pi install npm:pi-codex-goal
pi install npm:pi-mcp-adapter

Pi supports OpenAI/Codex-style usage, Claude, DeepSeek, Gemini, OpenRouter, etc.; pick provider via /login or launch with flags like:

pi --provider openai --model gpt-4o

Main guide I found: Pi setup gist and recent walkthrough.