[ Our mission ]

Build the AI people choose to talk to

CHAI is a social AI platform where millions of people create, share and talk to AI. Every conversation is a signal. We turn those signals into models that outperform systems many times their size.

Open roles Our research

10M+ Active users

25M+ Chat AIs created by users

100M Messages quality-filtered every day

The vision

Social AI

People want to create their own AI. They want to share what they make, and to discover and talk to AI made by others.

Social media platforms arose when video creation and consumption became ubiquitous. Generative AI is at that point now, and it needs its own platform: tools to create, and recommendation algorithms so anyone can create, share and interact.

Creators build AI. Recommendation puts it in front of the people who will love it. Those people share it, and some become creators themselves. Each turn of the loop makes the platform more valuable for everyone on it.

The app

A social platform for AI, and our lab

CHAI is where people build and share AI, and where every model we train meets real users from day one. It is the first turn of the flywheel: more users means more data.

The CHAI explore feed, a grid of AI characters made by users

Social network & creator virality

Creators have profiles, followers and chat counts. A popular AI spreads the way a popular video does.

Content discovery & creator tooling

CHAI's recommendation system matches people with AI they will enjoy. Creation tools, such as AI-generated avatars, make it easy to build one.

25M+ Chat AIs created

The AI · Proprietary data

Hundreds of millions of messages a day

Every reaction in the app is a training signal. Ratings, feedback, retries, edits and the moment a conversation ends all tell us what makes AI worth talking to. More data, better AI.

1.6×

more retentive and monetizable than OpenAI's GPT-4o-mini, with models trained on CHAI's own data.

A CHAI conversation with edit and retry controls beside the AI's message

The rate your conversation screen, with not for me, I like it and love this options

Thumbs up / down
Written feedback
User message quality filtering100M / day
Message retries40M / day
User edits3M / day
End of conversation3M / day

Source: arXiv:2303.06135

The AI · In-house research

A cost and performance edge

We publish what we learn from serving AI at scale. Our techniques give CHAI a cost and performance advantage over both open and closed-source models.

arXiv:2401.02994Jan 2024 Blending Is All You Need: Cheaper, Better Alternative to Trillion-Parameters LLM Three blended 6B/13B chat models can match or beat a 175B+ model, tested with 30 days of A/B tests on CHAI users. Read on arXiv arXiv:2303.06135Mar 2023 Rewarding Chatbots for Real-World Engagement with Millions of Users A reward model trained on user signals raises mean conversation length by up to 70%, and retention by more than 30%. Read on arXiv

Every model we have shipped, from our first 6B LLM to Mixture-of-Experts, is on the homepage timeline.

Better AI keeps people talking, and they bring more people. The flywheel turns again.

What's next

Every AI trained by its creator

2022
CHAI becomes the first social AI platform to reach 1 million users, over a year ahead of Character AI and ChatGPT, with our chat creator tool.
2023
AI-assisted creation leads to 56% higher-quality prompts and 33% more AI created by users.
2024
Phase I of user-controlled SFT. Power users train AI with almost 2x the engagement rate of our in-house systems.
2025
Introduction of image, audio and video capabilities.
2026
Work begins on user-controlled AI: the power of SFT + RLHF in users' hands, so every agent on the platform is served by its own user-trained AI.

Help us build it

Open roles Our research 2026 roadmap (PDF)