# Spirit AI Brain: robot foundation model

[Spirit AI](/companies/spirit-ai.md)'s general-purpose embodied AI model for humanoid robots. Trained on 'dirty data' — unstructured, real-world data pipelines. Raised $280M Series A at $1.2B valuation in February 2026. Develops universal robotic brains for the Moz1 humanoid platform.

- **Slug:** spirit-brain
- **Type:** Foundation model
- **Maturity (DEPLOY ladder):** Pilot
- **Open source:** no

## Architecture

Embodied AI model trained on real-world 'dirty data'


## Developed by (1)

- [Spirit AI](/companies/spirit-ai.md)


## Common questions

### What is Spirit AI Brain?

Spirit AI's general-purpose embodied AI model for humanoid robots. Trained on 'dirty data' — unstructured, real-world data pipelines. Raised $280M Series A at $1.2B valuation in February 2026. Develops universal robotic brains for the Moz1 humanoid platform.

### Who developed Spirit AI Brain?

Spirit AI Brain is credited to Spirit AI on the DEPLOY registry. Each developer attribution is verified via primary sources.

### Is Spirit AI Brain open source?

No. Spirit AI Brain is recorded as proprietary on the DEPLOY registry. Model weights and source are not publicly available.

### What type of AI is Spirit AI Brain?

Spirit AI Brain is a foundation model, built on a Embodied AI model trained on real-world 'dirty data' architecture on the DEPLOY registry.

### What is Spirit AI Brain's maturity stage?

Spirit AI Brain is at the pilot stage on the DEPLOY maturity ladder. Pilot stage means at least one named-customer trial deployment is verified.

### Which robots run on Spirit AI Brain?

No robot models on the DEPLOY registry are recorded as running Spirit AI Brain. DEPLOY wires brain-to-model connections only when the wiring is verifiable from primary sources; absence may reflect pre-deployment or unverified manufacturer claims.


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