{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-02-11-ai2-molmospaces/","md":"https://postcutoff.com/e/2026-02-11-ai2-molmospaces/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-02-11-ai2-molmospaces","date":"2026-02-11","date_precision":"day","short_title":"Ai2 launches MolmoSpaces, an open simulation ecosystem and leaderboard for generalist robot policies","deck":null,"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.","category":"benchmark","category_label":"Benchmarks","importance":2,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Ai2 blog: MolmoSpaces, an open ecosystem for embodied AI","url":"https://allenai.org/blog/molmospaces","type":"official","group":"primary","domain":"allenai.org"},{"n":2,"title":"arXiv 2602.11337: MolmoSpaces","url":"https://arxiv.org/pdf/2602.11337","type":"paper","group":"primary","domain":"arxiv.org"},{"n":3,"title":"MolmoSpaces leaderboard","url":"https://molmospaces.allen.ai/leaderboard","type":"official","group":"primary","domain":"molmospaces.allen.ai"}],"official":3,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Ai2"],"title":"Ai2 launches MolmoSpaces, an open simulation ecosystem and leaderboard for generalist robot policies","summary":"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. The leaderboard became one of the main places labs cite for robot-policy rankings; NVIDIA claimed No. 1 for GR00T N2 on MolmoSpaces and RoboArena at GTC 2026.","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"],"key_numbers":[],"tags":["robotics","simulation","benchmark","leaderboard","open-data"],"science":null,"body_md":"## What happened\n\nAi2 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.\n\n## Why it matters\n\nRobot 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.","disputed":[],"related":[{"id":"2026-05-05-ai2-molmoact-2","url":"https://postcutoff.com/e/2026-05-05-ai2-molmoact-2/","date":"2026-05-05","date_precision":"day","short_title":"Ai2 releases MolmoAct 2, a fully open robot action-reasoning model that beats π0.5 on real-world tasks","deck":null,"takeaway":"It is the most capable fully open VLA stack, with open data as well as weights.","category":"robotics","category_label":"Robotics","importance":2,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":5,"official":4,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Ai2"]},{"id":"2026-03-16-nvidia-gtc-2026-robotics-groot-n2-cosmos-3","url":"https://postcutoff.com/e/2026-03-16-nvidia-gtc-2026-robotics-groot-n2-cosmos-3/","date":"2026-03-16","date_precision":"day","short_title":"NVIDIA previews the GR00T N2 world action model and announces Cosmos 3 at GTC 2026","deck":null,"takeaway":"NVIDIA is pitching world-model-based policies and human video as a way to trade scarce robot teleoperation data for compute.","category":"robotics","category_label":"Robotics","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":10,"official":8,"filed":"2026-09-29","updated":"2026-09-29","orgs":["NVIDIA"]},{"id":"2025-06-22-roboarena","url":"https://postcutoff.com/e/2025-06-22-roboarena/","date":"2025-06-22","date_precision":"day","short_title":"RoboArena: crowd-sourced, double-blind real-world evaluation of generalist robot policies","deck":null,"takeaway":"Real-world robot evaluation is expensive and hard to standardize.","category":"benchmark","category_label":"Benchmarks","importance":2,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["RoboArena consortium"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":null,"in_training_data":true},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":null,"in_training_data":true},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":null}