# Boltz vs Chai-1 (Chai Discovery)

Boltz is free, with no paid plan attached. Chai-1 (Chai Discovery) is freemium — a usable free tier with paid plans above it.

| | Boltz | Chai-1 (Chai Discovery) |
|---|---|---|
| Pricing | Free | Free tier + paid plans |
| Free to start | Yes | Yes |
| Category | Research & Learning | Research & Learning |
| Type | Science & Research AI | Science & Research AI |
| Best for | First fully open-source model to approach AlphaFold3-level structure prediction, MIT-licensed | Chai-1 is free, Apache-2.0-licensed for academic and commercial use — a genuinely open structure-prediction model |

## FAQ

### Boltz vs Chai-1 (Chai Discovery): what is the difference?

Boltz is free, with no paid plan attached and is listed for first fully open-source model to approach AlphaFold3-level structure prediction, MIT-licensed. Chai-1 (Chai Discovery) is freemium — a usable free tier with paid plans above it and is listed for chai-1 is free, Apache-2.0-licensed for academic and commercial use — a genuinely open structure-prediction model. Both sit in Science & Research AI.

### Is Boltz or Chai-1 (Chai Discovery) cheaper to start with?

Boltz is the cheaper starting point: it is free, with no paid plan attached, while Chai-1 (Chai Discovery) is freemium — a usable free tier with paid plans above it. Pricing tiers here come from the catalog, not from a promotional page.

### Which should I choose, Boltz or Chai-1 (Chai Discovery)?

Choose Boltz if you need first fully open-source model to approach AlphaFold3-level structure prediction, MIT-licensed; choose Chai-1 (Chai Discovery) if you need chai-1 is free, Apache-2.0-licensed for academic and commercial use — a genuinely open structure-prediction model. Flocci AI Tools does not rank one above the other — it shows both feature sets side by side and lets the requirement decide.

## Related

- [Boltz](https://aitools.flocci.in/tool/boltz)
- [Chai-1 (Chai Discovery)](https://aitools.flocci.in/tool/chai-1-chai-discovery)
- [Boltz alternatives](https://aitools.flocci.in/alternatives/boltz)
- [Chai-1 (Chai Discovery) alternatives](https://aitools.flocci.in/alternatives/chai-1-chai-discovery)
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Source: Flocci AI Tools — https://aitools.flocci.in/compare/boltz-vs-chai-1-chai-discovery

Facts last verified: October 2026