# Flexion Brain: robot foundation model

[Flexion Robotics](/companies/flexion-robotics.md)' autonomy stack for humanoid robots spanning command, motion, and control layers. European company raised $50M Series A in November 2025.

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

## Architecture

Multi-layer autonomy stack for humanoids


## Developed by (1)

- [Flexion Robotics](/companies/flexion-robotics.md)


## Common questions

### What is Flexion Brain?

Flexion Robotics' autonomy stack for humanoid robots spanning command, motion, and control layers. European company raised $50M Series A in November 2025.

### Who developed Flexion Brain?

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

### Is Flexion Brain open source?

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

### What type of AI is Flexion Brain?

Flexion Brain is a foundation model, built on a Multi-layer autonomy stack for humanoids architecture on the DEPLOY registry.

### What is Flexion Brain's maturity stage?

Flexion 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 Flexion Brain?

No robot models on the DEPLOY registry are recorded as running Flexion 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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