Pi Coding Agent
Free CLI / Terminal
- Annual
- — (open source, BYOK)
- Usage limit
- Unlimited sessions; bring your own keys or OAuth
- Main limitation
- Minimal harness: no built-in sub-agents, plan mode or permission popups
- Included models
- 15+ providers Anthropic OpenAI Google DeepSeek OpenRouter Ollama
- Notes
- MIT-licensed, aggressively extensible agent with four modes (interactive, print/JSON, RPC, SDK).
- Popularity
- 22/100 adoption estimate (assumed), not market share. Pi: no published user count; 20K assumed for a harness that shipped 1.0 in October 2026. Tier share 1.00, assumed for the free tier. Source
Vendor pricing checked 2026-10-24