If you're new to A0 and didn't know this was possible: yes, you can run it entirely for free!
Agent Zero is now one of the most-used frameworks on the platform. 1.22B tokens processed this week. But the real win is that 215M of those tokens were on Grok 4.1 Fast, a completely free model. That means people are running AI agents for $0. No subscriptions, just Agent Zero + OpenRouter's free tier.