Ai2 launches MolmoSpaces, an open simulation ecosystem and leaderboard for generalist robot policies
Confirmed
The takeaway
On 2026-02-11 the Allen Institute for AI released MolmoSpaces, an open ecosystem of 230,000+ indoor scenes, 130,000+ object models and 42M+ annotated 6-DoF grasps usable in MuJoCo, ManiSkill and Isaac Lab/Sim, together with MolmoSpaces-Bench and a public leaderboard.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 2 of 5
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 AstraIn its training data
- Claude Opus 5.5In its training data
- Gemini 4 HydrogenIn its training data
- Grok 4.7In its training data
It happened before the cutoffs of all four assistants, so it can be in their training data.
Key facts
- 230,000+ indoor scenes, 130,000+ object models (curated from Objaverse and THOR), 42M+ 6-DoF grasps over 48,000+ objects
- Simulators: MuJoCo, ManiSkill, NVIDIA Isaac Lab/Sim (via USD conversion); navigation and manipulation
- MolmoSpaces-Bench measures generalization along controlled axes (object properties, layout, task complexity, lighting/viewpoint, dynamics, instruction phrasing) instead of one success rate
- Leaderboard: molmospaces.allen.ai/leaderboard; simulation only
- Paper: arXiv 2602.11337
What happened
Ai2 combined large-scale procedurally generated and curated 3D homes, object libraries and grasp annotations into one open robot-learning ecosystem with a standardized benchmark and leaderboard.
Why it matters
Robot learning lacked shared benchmarks like those language models have. MolmoSpaces (simulated) and RoboArena (real-world, crowd-sourced) have become the standard leaderboards cited in 2026 model launches. Because MolmoSpaces is simulation-only, how well it predicts real-world performance is still an open question.
Sources
3 sources from 3 sites. Numbers match the chips in the text.
3 sources: 3 primary
Primary
- Ai2 blog: MolmoSpaces, an open ecosystem for embodied AIallenai.org, official
- arXiv 2602.11337: MolmoSpacesarxiv.org, paper
- MolmoSpaces leaderboardmolmospaces.allen.ai, official
Changes
- Filed