An open-source project to build a 4o-like AI, focused on personality, not parameters.
Website: github.com/Project-4o/project-4o Community: r/project4o License: MIT
Project-4o is an attempt to recreate the feel of a 4o-style AI, one that actually talks like a person, not a manual. Think natural conversation, personality, roleplay support, and less of that stiff, overly-safe corporate tone.
This isn't about building the biggest model. It's about building the best experience.
- Natural, fluid conversation
- Real personality (not a persona bolted on top)
- Roleplay (RP) mode that actually works
- Less rigid, more human behavior
- Small and efficient, not everything needs 70B parameters
- Start with small models (3B to 7B range)
- Fine-tune using LoRA adapters
- Focus training on personality, tone, and interaction quality
- Iterate fast, keep it lightweight
This is a community project. Everyone's welcome. See CONTRIBUTING.md for details.
- Developers — model training, tooling, infrastructure
- Writers — training data, conversation examples, personality design
- Testers — try the models, report what works and what doesn't
- Ideas — if you have thoughts on what makes an AI feel natural, share them
Check the issues or join the conversation on Reddit.
Project-4o is released under the MIT License.