{"schema_version":"onlylabs.public_signal.v1","title":"OpenBMB (MiniCPM) Model: openbmb/JustRL-II-base-model","description":"OpenBMB (MiniCPM) model signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/ef917e21-8de0-4123-b6bf-3bf014cd86a2","json_url":"https://onlylabs.fyi/signals/ef917e21-8de0-4123-b6bf-3bf014cd86a2/signal.json","generated_at":"2026-09-09T18:47:34.571Z","evidence_latest_fetched_at":"2026-09-08T07:20:23.801815+00:00","signal_first_seen_at":"2026-09-08T07:20:08.657444+00:00","org":{"slug":"openbmb","name":"OpenBMB (MiniCPM)","category":"neolab","category_label":"Neolab","dossier_url":"https://onlylabs.fyi/labs/openbmb","dossier_json_url":"https://onlylabs.fyi/labs/openbmb/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/ef917e21-8de0-4123-b6bf-3bf014cd86a2","signal_json":"https://onlylabs.fyi/signals/ef917e21-8de0-4123-b6bf-3bf014cd86a2/signal.json","source":"https://huggingface.co/openbmb/JustRL-II-base-model","lab_dossier":"https://onlylabs.fyi/labs/openbmb","lab_dossier_json":"https://onlylabs.fyi/labs/openbmb/dossier.json","analysis":"https://onlylabs.fyi/analysis/openbmb","analysis_json":"https://onlylabs.fyi/analysis/openbmb/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/openbmb/evidence.json","category":"https://onlylabs.fyi/neolabs","category_json":"https://onlylabs.fyi/neolabs.json","category_feed":"https://onlylabs.fyi/neolabs/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json?category=neolab","topic":"https://onlylabs.fyi/topics/releases","topic_signals_json":"https://onlylabs.fyi/topics/releases/signals.json?category=neolab","topic_feed":"https://onlylabs.fyi/topics/releases/feed.xml?category=neolab","data_business":null},"answer_pack":{"answer":"OpenBMB (MiniCPM) published openbmb/JustRL-II-base-model. This model signal is evidence of what shipped on model infrastructure and how the release is positioned. High-signal details: 26 HF downloads · OpenBMB's JustRL-II base model for reinforcement learning.. onlylabs links this event to 1 captured evidence page and 6 related model signals.","signal_desk":"releases","source_context":{"source_url":"https://huggingface.co/openbmb/JustRL-II-base-model","source_host":"huggingface.co","occurred_at":"2026-09-07T08:25:05+00:00","first_seen_at":"2026-09-08T07:20:08.657444+00:00","date_source":"source","context":null},"context_markers":[{"label":"Lab","value":"OpenBMB (MiniCPM)","source":"signal"},{"label":"Signal desk","value":"releases","source":"signal"},{"label":"Source host","value":"huggingface.co","source":"source"},{"label":"Task","value":"text-generation","source":"model"},{"label":"Library","value":"transformers","source":"model"},{"label":"Downloads","value":"26","source":"traction"},{"label":"Likes","value":"5","source":"traction"},{"label":"Context","value":"OpenBMB's JustRL-II base model for reinforcement learning.","source":"signal"},{"label":"Notability","value":"OpenBMB released a notable base model for RL research.","source":"signal"},{"label":"Watch term","value":"RL environments","source":"evidence"},{"label":"Watch term","value":"Eval methodology","source":"evidence"},{"label":"Watch term","value":"Model card","source":"model"},{"label":"Watch term","value":"Data pipeline","source":"evidence"},{"label":"Watch term","value":"Infrastructure","source":"evidence"},{"label":"Watch term","value":"Safety and alignment","source":"evidence"}],"evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://huggingface.co/openbmb/JustRL-II-base-model/raw/main/README.md"],"related_signals":6,"has_source_url":true,"latest_page_fetched_at":"2026-09-08T07:20:23.801815+00:00"},"data_business":{"matches":false,"lanes":[],"matched_terms":[],"score":null,"reason":null},"agent_handoff":{"signal_json":"https://onlylabs.fyi/signals/ef917e21-8de0-4123-b6bf-3bf014cd86a2/signal.json","dossier_json":"https://onlylabs.fyi/labs/openbmb/dossier.json","analysis_json":"https://onlylabs.fyi/analysis/openbmb/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/openbmb/evidence.json","topic_signals_json":"https://onlylabs.fyi/topics/releases/signals.json?category=neolab","topic_feed":"https://onlylabs.fyi/topics/releases/feed.xml?category=neolab","category_signals_json":"https://onlylabs.fyi/signals.json?category=neolab","data_radar_json":null,"opportunities_json":null},"analysis_playbook":{"objective":"Turn model cards, repository releases, and launch artifacts into a current view of what shipped and what changed.","evidence_focus":["model card","release note","version or tag","pipeline tag","license","downloads, likes, stars, and linked papers"],"extraction_questions":["What actually shipped, and through which public artifact?","Which releases include inspectable model, repo, paper, or package evidence?","Which launches create new eval, data, infra, or deployment needs?","Which shipped signals are missing captured page context?"],"signal_questions":["What shipped in this model artifact, and what evidence describes its capability, license, or traction?","What actually shipped, and through which public artifact?","Which releases include inspectable model, repo, paper, or package evidence?","Do the 6 related model signals show a repeated pattern?"],"output_fields":["org","release_type","artifact","traction","evidence_url"],"data_business_relevance":"Data-business lane extraction is scoped to frontier labs; for this category, keep conclusions tied to category-specific strategy, source evidence, and follow-up questions.","required_sources":[{"label":"signal_json","url":"https://onlylabs.fyi/signals/ef917e21-8de0-4123-b6bf-3bf014cd86a2/signal.json","required":true},{"label":"source","url":"https://huggingface.co/openbmb/JustRL-II-base-model","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/openbmb/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/openbmb/evidence.json","required":true},{"label":"topic_signals_json","url":"https://onlylabs.fyi/topics/releases/signals.json?category=neolab","required":false},{"label":"data_radar_json","url":null,"required":false}],"expected_output":["one-paragraph source-grounded interpretation","category-specific implication","confidence and missing evidence","recommended next source to inspect"],"prompt_seed":"Using only the linked onlylabs JSON, captured source context, and cited evidence, analyze OpenBMB (MiniCPM)'s model signal \"openbmb/JustRL-II-base-model\" for neolab strategy."},"semantic_triples":[{"subject":"OpenBMB (MiniCPM)","predicate":"published model","object":"openbmb/JustRL-II-base-model","text":"OpenBMB (MiniCPM) published model openbmb/JustRL-II-base-model."},{"subject":"openbmb/JustRL-II-base-model","predicate":"is classified as","object":"model signal","text":"openbmb/JustRL-II-base-model is classified as model signal."},{"subject":"openbmb/JustRL-II-base-model","predicate":"belongs to","object":"releases desk","text":"openbmb/JustRL-II-base-model belongs to releases desk."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has evidence coverage","object":"1 captured evidence page","text":"openbmb/JustRL-II-base-model has evidence coverage 1 captured evidence page."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has captured page count","object":"1","text":"openbmb/JustRL-II-base-model has captured page count 1."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has readable page count","object":"1","text":"openbmb/JustRL-II-base-model has readable page count 1."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has related signal count","object":"6","text":"openbmb/JustRL-II-base-model has related signal count 6."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has analysis playbook objective","object":"Turn model cards, repository releases, and launch artifacts into a current view of what shipped and what changed.","text":"openbmb/JustRL-II-base-model has analysis playbook objective Turn model cards, repository releases, and launch artifacts into a current view of what shipped and what changed.."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has source host","object":"huggingface.co","text":"openbmb/JustRL-II-base-model has source host huggingface.co."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has lab","object":"OpenBMB (MiniCPM)","text":"openbmb/JustRL-II-base-model has lab OpenBMB (MiniCPM)."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has signal desk","object":"releases","text":"openbmb/JustRL-II-base-model has signal desk releases."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has source host","object":"huggingface.co","text":"openbmb/JustRL-II-base-model has source host huggingface.co."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has task","object":"text-generation","text":"openbmb/JustRL-II-base-model has task text-generation."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has library","object":"transformers","text":"openbmb/JustRL-II-base-model has library transformers."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has downloads","object":"26","text":"openbmb/JustRL-II-base-model has downloads 26."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has likes","object":"5","text":"openbmb/JustRL-II-base-model has likes 5."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has context","object":"OpenBMB's JustRL-II base model for reinforcement learning.","text":"openbmb/JustRL-II-base-model has context OpenBMB's JustRL-II base model for reinforcement learning.."}]},"intelligence":{"signal_desk":"releases","answer":"OpenBMB (MiniCPM) published openbmb/JustRL-II-base-model. This model signal is evidence of what shipped on model infrastructure and how the release is positioned. High-signal details: 26 HF downloads · OpenBMB's JustRL-II base model for reinforcement learning.. onlylabs links this event to 1 captured evidence page and 6 related model signals.","semantic_triples":[{"subject":"OpenBMB (MiniCPM)","predicate":"published model","object":"openbmb/JustRL-II-base-model","text":"OpenBMB (MiniCPM) published model openbmb/JustRL-II-base-model."},{"subject":"openbmb/JustRL-II-base-model","predicate":"is classified as","object":"model signal","text":"openbmb/JustRL-II-base-model is classified as model signal."},{"subject":"openbmb/JustRL-II-base-model","predicate":"belongs to","object":"releases desk","text":"openbmb/JustRL-II-base-model belongs to releases desk."},{"subject":"openbmb/JustRL-II-base-model","predicate":"has evidence coverage","object":"1 captured evidence page","text":"openbmb/JustRL-II-base-model has evidence coverage 1 captured evidence page."}]},"signal":{"id":"ef917e21-8de0-4123-b6bf-3bf014cd86a2","url":"https://onlylabs.fyi/signals/ef917e21-8de0-4123-b6bf-3bf014cd86a2","json_url":"https://onlylabs.fyi/signals/ef917e21-8de0-4123-b6bf-3bf014cd86a2/signal.json","source_url":"https://huggingface.co/openbmb/JustRL-II-base-model","title":"openbmb/JustRL-II-base-model","summary":"OpenBMB (MiniCPM) published a model signal. onlylabs watches model cards, launch context, and traction.","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"openbmb","name":"OpenBMB (MiniCPM)","category":"neolab"},"occurred_at":"2026-09-07T08:25:05+00:00","first_seen_at":"2026-09-08T07:20:08.657444+00:00","date_source":"source","evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://huggingface.co/openbmb/JustRL-II-base-model/raw/main/README.md"]},"facets":{"pipeline_tag":"text-generation"},"traction":{"github_stars":null,"hn_points":null,"hn_comments":null,"hn_story_id":null,"hf_downloads":26,"hf_likes":5},"data_radar":null},"primary_evidence_page":{"is_primary":true,"source_match":true,"url":"https://huggingface.co/openbmb/JustRL-II-base-model/raw/main/README.md","final_url":"https://huggingface.co/openbmb/JustRL-II-base-model/raw/main/README.md","title":"openbmb/JustRL-II-base-model model card","http_status":200,"content_type":"text/plain; charset=utf-8","capture_method":"plain","fetched_at":"2026-09-08T07:20:23.801815+00:00","bytes":5097,"raw_path":"dc6b98188699dfa365173cfd8b8d04799b660dbed3f910c06538667f076b547d.md","content_hash":"131cd28701349bc98bb98b0a3583ac69534b57a05130b7c1c7d4e69fd8ce335c","excerpt_chars":1200,"truncated":true,"excerpt":"JustRL-II Base Model This is the **RL initialization checkpoint** used in the blog [**JustRL II: Scaling Small LLMs to 128K Reasoning with a Critic**](https://panhaoxuan.notion.site/justrl-ii-scaling-small-llms-to-128k-reasoning-with-a-critic) ([中文版](https://panhaoxuan.notion.site/justrl-ii-small-llms-to-128k-reasoning-with-a-critic-cn)). It is the *starting point* of the mathematical-reasoning case study in that blog — the checkpoint that every run there (the standard-GRPO baseline, the full JustRL II recipe, and all ablations) is initialized from and evaluated against. It is **not** the post-RL model. We release it so that the blog's data pipeline and training recipe can be reproduced from the exact same starting weights. What this checkpoint is - A small language model that has already been trained to produce long chain-of-thought (thinking) responses. It emits its reasoning inside ` ... ` before the final answer. - Before any RL, it scores about **61%** on AIME 2025 under the blog's evaluation protocol (average over sampled responses, 128k-token generation budget). - Starting from this checkpoint, the full JustRL II recipe reaches **81%** on AIME 2025 in ~300 RL steps, while a..."},"evidence_pages":[],"related_signals":[{"id":"0f647d0f-1ca9-4787-b107-0fe653027fc7","url":"https://onlylabs.fyi/signals/0f647d0f-1ca9-4787-b107-0fe653027fc7","source_url":"https://huggingface.co/openbmb/UltraData-Code-L2-Classifier","title":"openbmb/UltraData-Code-L2-Classifier","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"openbmb","name":"OpenBMB (MiniCPM)","category":"neolab"},"occurred_at":"2026-09-06T12:40:06+00:00","first_seen_at":"2026-09-08T07:20:08.657444+00:00","date_source":"source"},{"id":"f518f533-1589-490a-848b-27b67843fa28","url":"https://onlylabs.fyi/signals/f518f533-1589-490a-848b-27b67843fa28","source_url":"https://huggingface.co/openbmb/MiniCPM5-2B-DSpark","title":"openbmb/MiniCPM5-2B-DSpark","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"openbmb","name":"OpenBMB (MiniCPM)","category":"neolab"},"occurred_at":"2026-09-06T11:33:35+00:00","first_seen_at":"2026-09-08T07:20:08.657444+00:00","date_source":"source"},{"id":"4b474f8a-783c-4771-a9be-0961aa429745","url":"https://onlylabs.fyi/signals/4b474f8a-783c-4771-a9be-0961aa429745","source_url":"https://huggingface.co/openbmb/MiniCPM5-2B","title":"openbmb/MiniCPM5-2B","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"openbmb","name":"OpenBMB (MiniCPM)","category":"neolab"},"occurred_at":"2026-09-06T11:12:19+00:00","first_seen_at":"2026-09-08T07:20:08.657444+00:00","date_source":"source"},{"id":"fa11d615-a1dd-4796-9e4d-1800875104d5","url":"https://onlylabs.fyi/signals/fa11d615-a1dd-4796-9e4d-1800875104d5","source_url":"https://huggingface.co/openbmb/MiniCPM5-2B-Midtrain","title":"openbmb/MiniCPM5-2B-Midtrain","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"openbmb","name":"OpenBMB (MiniCPM)","category":"neolab"},"occurred_at":"2026-09-01T06:21:58+00:00","first_seen_at":"2026-09-08T07:20:08.657444+00:00","date_source":"source"},{"id":"083fefdc-08d3-4b26-aaa6-9b58d5be2cb4","url":"https://onlylabs.fyi/signals/083fefdc-08d3-4b26-aaa6-9b58d5be2cb4","source_url":"https://huggingface.co/openbmb/MiniCPM5-2B-SFT","title":"openbmb/MiniCPM5-2B-SFT","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"openbmb","name":"OpenBMB (MiniCPM)","category":"neolab"},"occurred_at":"2026-08-27T09:28:38+00:00","first_seen_at":"2026-09-08T07:20:08.657444+00:00","date_source":"source"},{"id":"736e2ea3-dadb-4141-86c8-f4cf0ada2acd","url":"https://onlylabs.fyi/signals/736e2ea3-dadb-4141-86c8-f4cf0ada2acd","source_url":"https://huggingface.co/openbmb/MiniCPM5-2B-Base","title":"openbmb/MiniCPM5-2B-Base","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"openbmb","name":"OpenBMB (MiniCPM)","category":"neolab"},"occurred_at":"2026-08-27T09:28:30+00:00","first_seen_at":"2026-09-08T07:20:08.657444+00:00","date_source":"source"}]}