Ai2 · MolmoAct 2 · active
MolmoAct 2
Ai2's open action reasoning model for real-world robot control and post-training across single-arm and bimanual tasks.
allenai/MolmoAct2This page represents one immutable developer model ID. Serving endpoints, pricing, regions, quantizations, and service tiers attach separately and never create duplicate model records.
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Explicit unknowns
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Questions
MolmoAct 2 FAQs
What is MolmoAct 2?+
Ai2's open action reasoning model for real-world robot control and post-training across single-arm and bimanual tasks. It is developed by Ai2 and its current sourced lifecycle status is active.
What inputs and outputs does MolmoAct 2 support?+
MolmoAct 2's current record lists Text, Image, and Robot state as input and Robot action as output.
Is MolmoAct 2 available through an API?+
MolmoAct 2 is explicitly marked as not API-available in the current record.
How large is MolmoAct 2?+
The current record lists 5B total parameters and an unknown active parameter count. Its architecture is Molmo 2-ER backbone with KV-cache bridge and action expert.
What capabilities and tasks does MolmoAct 2 support?+
MolmoAct 2's recorded capabilities are action-reasoning, bimanual-manipulation, depth-reasoning, and fine-tuning. Its supported tasks are robot-control, dexterous-manipulation, and bimanual-manipulation.
Can MolmoAct 2 be self-hosted?+
MolmoAct 2 is an open-weight model. Self-hosting is supported, and the recorded license is apache-2.0.
Does MolmoAct 2 have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are allenai/MolmoAct2.
Which models can MolmoAct 2 be compared with?+
The current compatible peer set includes OpenVLA 7B, GR00T N1.7 3B, SmolVLA 450M, Helix 02, and pi 0.7. Compatibility requires shared sourced modalities and tasks; it does not imply that one model is better. Browse model comparisons →
How current is the Model Markets record for MolmoAct 2?+
MolmoAct 2 was last verified Aug 28, 2026 from Ai2's primary source, “MolmoAct2 developer model repository.” The evidence is classified as official fact.
Primary evidence