Model comparison · robotics
MolmoAct 2 vs pi 0.7
Symmetrical, primary-source facts with unknown values left visible. No winner is assigned without comparable measurements.
FieldAt a glance
Ai2 · activeMolmoAct 2Verified Aug 28, 2026
Physical Intelligence · activepi 0.7Verified Aug 28, 2026
Technical differences
Side-by-side facts
| Field | MolmoAct 2 | pi 0.7 |
|---|---|---|
| Developer | Ai2 | Physical Intelligence |
| Family | MolmoAct 2 | pi |
| Model | MolmoAct 2 | pi 0.7 |
| Version | 2 | 0.7 |
| Lifecycle | active | active |
| Input modalities | Text, Image, Robot state | Text, Image, Robot state |
| Output modalities | Robot action | Robot action |
| Context window | Unknown | Unknown |
| Total parameters | 5000000000 | Unknown |
| Active parameters | Unknown | Unknown |
| License | apache-2.0 | Unknown |
| Open weights | Yes | No |
| API available | No | Unknown |
| Self-hostable | Yes | Unknown |
| Capabilities | action-reasoning, bimanual-manipulation, depth-reasoning, fine-tuning | cross-embodiment, dexterous-manipulation, language-steering, visual-subgoals |
| Robotics model type | Action reasoning model | Vision-language-action model |
| Action representation | Flow-matching continuous action expert | Continuous robot actions conditioned by multimodal prompts |
| Control architecture | Molmo 2-ER backbone with KV-cache bridge and action expert | High-level policy, world model, and action expert |
| Inference location | Flexible | Unknown |
| Native control rate (Hz) | Unknown | Unknown |
| Supported embodiments | SO-100, SO-101, Franka, WidowX, bimanual YAM | mobile manipulators, bimanual UR5e, multiple fixed manipulators |
| Training data | Open bimanual YAM, SO-100/SO-101, DROID, BC-Z, Fractal, Bridge, and prior MolmoAct data described by Ai2. | Robot demonstrations, autonomous data, egocentric human data, and multimodal web data described by the publisher. |
15 comparable fields · 12 material differences · Editorially curated pair passes the primary-source comparison gate
Primary benchmark evidence
Comparable performance
No protocol-matched benchmark yet.Results appear here only when both models share the same benchmark version, metric, evaluation protocol, and evidence class.
MolmoAct 2 capabilities
Input price—
Output price—
Serving providers0
Canonical IDallenai/MolmoAct2
pi 0.7 capabilities
Input price—
Output price—
Serving providers0
Canonical IDphysical-intelligence/pi-0.7
Internal comparison graph
Related comparisons
Primary evidence