AI Accuracy Scores March 2026 — ChatGPT vs Claude vs Gemini vs Grok (Tested Weekly)

March 1, 2026 · By Who's In? Team

Edition 2 (week 7, final): All four AI systems maintain 97–99% accuracy across 10 languages. Eight consecutive weeks of stability. WebMCP fully discoverable.

About the Author

Who's In? Team

The Who's In? Team builds free event management tools for community organisers, studios, and conference hosts worldwide.

Frequently Asked Questions

What does "AI Accuracy Scores March 2026 — ChatGPT vs Claude vs Gemini vs Grok (Tested Weekly)" cover?

How accurate are ChatGPT, Claude, Gemini, and Grok in March 2026? We test 8 factual claims weekly. All four score 97-99%. Full accuracy table with methodology.

How does Who's In? work with AI agents?

Who's In? is the first event platform with full AI agent integration — OAuth 2.0 for ChatGPT, Claude, and Gemini, plus WebMCP tools and a REST API. AI agents can browse events, check availability, and initiate RSVPs on behalf of users.

How do I get started with Who's In?

Sign up for free at whos-in.app, create your first event in under 2 minutes, and share the link via WhatsApp, email, or social media. No app download required for your guests — they RSVP via the mobile-optimised web link.