{"schema_version":"onlylabs.public_signal.v1","title":"StepFun Model: stepfun-ai/NextStep-1.1-Pretrain-256px","description":"StepFun model signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/59a33bc4-341e-4c3e-8230-749ae55f0530","json_url":"https://onlylabs.fyi/signals/59a33bc4-341e-4c3e-8230-749ae55f0530/signal.json","generated_at":"2026-06-11T02:49:43.617486+00:00","org":{"slug":"stepfun","name":"StepFun","category":"neolab","category_label":"Neolab","dossier_url":"https://onlylabs.fyi/labs/stepfun","dossier_json_url":"https://onlylabs.fyi/labs/stepfun/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/59a33bc4-341e-4c3e-8230-749ae55f0530","signal_json":"https://onlylabs.fyi/signals/59a33bc4-341e-4c3e-8230-749ae55f0530/signal.json","source":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px","lab_dossier":"https://onlylabs.fyi/labs/stepfun","lab_dossier_json":"https://onlylabs.fyi/labs/stepfun/dossier.json","analysis":"https://onlylabs.fyi/analysis/stepfun","analysis_json":"https://onlylabs.fyi/analysis/stepfun/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/stepfun/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":"StepFun published stepfun-ai/NextStep-1.1-Pretrain-256px. This model signal is evidence of what shipped on model infrastructure and how the release is positioned. High-signal details: license apache-2.0 · 19 HF downloads · Low downloads, minor release. onlylabs links this event to 1 captured evidence page and 6 related model signals.","signal_desk":"releases","source_context":{"source_url":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px","source_host":"huggingface.co","occurred_at":"2026-02-16T06:26:39+00:00","first_seen_at":"2026-06-06T01:49:42.562564+00:00","date_source":"source","context":null},"context_markers":[{"label":"Lab","value":"StepFun","source":"signal"},{"label":"Signal desk","value":"releases","source":"signal"},{"label":"Source host","value":"huggingface.co","source":"source"},{"label":"Task","value":"text-to-image","source":"model"},{"label":"License","value":"apache-2.0","source":"model"},{"label":"Library","value":"transformers","source":"model"},{"label":"Params","value":"15B","source":"model"},{"label":"Downloads","value":"19","source":"traction"},{"label":"Likes","value":"13","source":"traction"},{"label":"Notability","value":"Low downloads, minor release","source":"signal"},{"label":"Watch term","value":"RL environments","source":"evidence"},{"label":"Watch term","value":"Model card","source":"model"},{"label":"Watch term","value":"Infrastructure","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/stepfun-ai/NextStep-1.1-Pretrain-256px/raw/main/README.md"],"related_signals":6,"has_source_url":true,"latest_page_fetched_at":"2026-06-11T02:49:43.617486+00:00"},"data_business":{"matches":false,"lanes":[],"matched_terms":[],"score":null,"reason":null},"agent_handoff":{"signal_json":"https://onlylabs.fyi/signals/59a33bc4-341e-4c3e-8230-749ae55f0530/signal.json","dossier_json":"https://onlylabs.fyi/labs/stepfun/dossier.json","analysis_json":"https://onlylabs.fyi/analysis/stepfun/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/stepfun/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/59a33bc4-341e-4c3e-8230-749ae55f0530/signal.json","required":true},{"label":"source","url":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/stepfun/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/stepfun/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 StepFun's model signal \"stepfun-ai/NextStep-1.1-Pretrain-256px\" for neolab strategy."},"semantic_triples":[{"subject":"StepFun","predicate":"published model","object":"stepfun-ai/NextStep-1.1-Pretrain-256px","text":"StepFun published model stepfun-ai/NextStep-1.1-Pretrain-256px."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"is classified as","object":"model signal","text":"stepfun-ai/NextStep-1.1-Pretrain-256px is classified as model signal."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"belongs to","object":"releases desk","text":"stepfun-ai/NextStep-1.1-Pretrain-256px belongs to releases desk."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has evidence coverage","object":"1 captured evidence page","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has evidence coverage 1 captured evidence page."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has captured page count","object":"1","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has captured page count 1."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has readable page count","object":"1","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has readable page count 1."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has related signal count","object":"6","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has related signal count 6."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","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":"stepfun-ai/NextStep-1.1-Pretrain-256px has analysis playbook objective Turn model cards, repository releases, and launch artifacts into a current view of what shipped and what changed.."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has source host","object":"huggingface.co","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has source host huggingface.co."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has lab","object":"StepFun","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has lab StepFun."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has signal desk","object":"releases","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has signal desk releases."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has source host","object":"huggingface.co","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has source host huggingface.co."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has task","object":"text-to-image","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has task text-to-image."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has license","object":"apache-2.0","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has license apache-2.0."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has library","object":"transformers","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has library transformers."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has params","object":"15B","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has params 15B."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has downloads","object":"19","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has downloads 19."}]},"intelligence":{"signal_desk":"releases","answer":"StepFun published stepfun-ai/NextStep-1.1-Pretrain-256px. This model signal is evidence of what shipped on model infrastructure and how the release is positioned. High-signal details: license apache-2.0 · 19 HF downloads · Low downloads, minor release. onlylabs links this event to 1 captured evidence page and 6 related model signals.","semantic_triples":[{"subject":"StepFun","predicate":"published model","object":"stepfun-ai/NextStep-1.1-Pretrain-256px","text":"StepFun published model stepfun-ai/NextStep-1.1-Pretrain-256px."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"is classified as","object":"model signal","text":"stepfun-ai/NextStep-1.1-Pretrain-256px is classified as model signal."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"belongs to","object":"releases desk","text":"stepfun-ai/NextStep-1.1-Pretrain-256px belongs to releases desk."},{"subject":"stepfun-ai/NextStep-1.1-Pretrain-256px","predicate":"has evidence coverage","object":"1 captured evidence page","text":"stepfun-ai/NextStep-1.1-Pretrain-256px has evidence coverage 1 captured evidence page."}]},"signal":{"id":"59a33bc4-341e-4c3e-8230-749ae55f0530","url":"https://onlylabs.fyi/signals/59a33bc4-341e-4c3e-8230-749ae55f0530","json_url":"https://onlylabs.fyi/signals/59a33bc4-341e-4c3e-8230-749ae55f0530/signal.json","source_url":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px","title":"stepfun-ai/NextStep-1.1-Pretrain-256px","summary":"StepFun published a model signal. onlylabs watches model cards, launch context, and traction.","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"stepfun","name":"StepFun","category":"neolab"},"occurred_at":"2026-02-16T06:26:39+00:00","first_seen_at":"2026-06-06T01:49:42.562564+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/stepfun-ai/NextStep-1.1-Pretrain-256px/raw/main/README.md"]},"facets":{"pipeline_tag":"text-to-image","license":"apache-2.0"},"traction":{"github_stars":null,"hn_points":null,"hn_comments":null,"hn_story_id":null,"hf_downloads":19,"hf_likes":13},"data_radar":null},"primary_evidence_page":{"url":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px/raw/main/README.md","final_url":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px/raw/main/README.md","title":"stepfun-ai/NextStep-1.1-Pretrain-256px model card","http_status":200,"content_type":"text/plain; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T02:49:43.617486+00:00","bytes":4052,"raw_path":"8e3682228de0c53f5c0d7dd4c409a749558f626307b1da7b381ccf50de258d63.md","content_hash":"d6d66163f0065e1735d4cb82bcaa2e2f2372f33ecfc85fe9cde818973314b770","excerpt_chars":1200,"truncated":true,"excerpt":"--- license: apache-2.0 pipeline_tag: text-to-image library_name: transformers --- NextStep-1.1 [Homepage](https://stepfun.ai/research/en/nextstep-1)&nbsp; | [GitHub](https://github.com/stepfun-ai/NextStep-1)&nbsp; | [Paper](https://arxiv.org/abs/2508.10711)&nbsp; We introduce **NextStep-1.1**, a new model represents a significant leap forward in the NextStep series. This version effectively resolves the visualization failures seen in **NextStep-1** and substantially elevates image quality through extended training and a Flow-based Reinforcement Learning (RL) post-training paradigm. <div align='center'> <img src=\"assets/comparision.png\" class=\"interpolation-image\" alt=\"arch.\" width=\"100%\" /> </div> What's New in 1.1? NextStep-1.1 is not just a fine-tune; it is a re-engineered version focused on stability and high-fidelity output. Key improvements include: - RL Enhanced Visual Fidelity: Significant improvement in image texture and a substantial reduction in visual artifacts via RL, ensuring much cleaner and more professional outputs. - Technical Stability: Solves numerical instability inherent in autoregressive flow-based models. Environment Setup To avoid potential errors when..."},"evidence_pages":[{"url":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px/raw/main/README.md","final_url":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px/raw/main/README.md","title":"stepfun-ai/NextStep-1.1-Pretrain-256px model card","http_status":200,"content_type":"text/plain; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T02:49:43.617486+00:00","bytes":4052,"raw_path":"8e3682228de0c53f5c0d7dd4c409a749558f626307b1da7b381ccf50de258d63.md","content_hash":"d6d66163f0065e1735d4cb82bcaa2e2f2372f33ecfc85fe9cde818973314b770","excerpt_chars":1200,"truncated":true,"excerpt":"--- license: apache-2.0 pipeline_tag: text-to-image library_name: transformers --- NextStep-1.1 [Homepage](https://stepfun.ai/research/en/nextstep-1)&nbsp; | [GitHub](https://github.com/stepfun-ai/NextStep-1)&nbsp; | [Paper](https://arxiv.org/abs/2508.10711)&nbsp; We introduce **NextStep-1.1**, a new model represents a significant leap forward in the NextStep series. This version effectively resolves the visualization failures seen in **NextStep-1** and substantially elevates image quality through extended training and a Flow-based Reinforcement Learning (RL) post-training paradigm. <div align='center'> <img src=\"assets/comparision.png\" class=\"interpolation-image\" alt=\"arch.\" width=\"100%\" /> </div> What's New in 1.1? NextStep-1.1 is not just a fine-tune; it is a re-engineered version focused on stability and high-fidelity output. Key improvements include: - RL Enhanced Visual Fidelity: Significant improvement in image texture and a substantial reduction in visual artifacts via RL, ensuring much cleaner and more professional outputs. - Technical Stability: Solves numerical instability inherent in autoregressive flow-based models. Environment Setup To avoid potential errors when..."}],"related_signals":[{"id":"75371011-2872-44b9-bf60-c41fb2e2f0fb","url":"https://onlylabs.fyi/signals/75371011-2872-44b9-bf60-c41fb2e2f0fb","source_url":"https://huggingface.co/stepfun-ai/Step-3.7-Flash","title":"stepfun-ai/Step-3.7-Flash","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"stepfun","name":"StepFun","category":"neolab"},"occurred_at":"2026-05-23T02:13:46+00:00","first_seen_at":"2026-06-06T01:49:42.562564+00:00","date_source":"source"},{"id":"1a84a279-2a4f-4253-80c9-4f07acd82b3f","url":"https://onlylabs.fyi/signals/1a84a279-2a4f-4253-80c9-4f07acd82b3f","source_url":"https://huggingface.co/stepfun-ai/Step-3.5-Flash-Base","title":"stepfun-ai/Step-3.5-Flash-Base","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"stepfun","name":"StepFun","category":"neolab"},"occurred_at":"2026-03-02T16:17:50+00:00","first_seen_at":"2026-06-06T01:49:42.562564+00:00","date_source":"source"},{"id":"65659b12-3d4e-4cb7-96f5-783dc1bc2372","url":"https://onlylabs.fyi/signals/65659b12-3d4e-4cb7-96f5-783dc1bc2372","source_url":"https://huggingface.co/stepfun-ai/Step-3.5-Flash-Base-Midtrain","title":"stepfun-ai/Step-3.5-Flash-Base-Midtrain","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"stepfun","name":"StepFun","category":"neolab"},"occurred_at":"2026-03-02T09:49:21+00:00","first_seen_at":"2026-06-06T01:49:42.562564+00:00","date_source":"source"},{"id":"8d249566-8324-459c-a4ba-999588e66894","url":"https://onlylabs.fyi/signals/8d249566-8324-459c-a4ba-999588e66894","source_url":"https://huggingface.co/stepfun-ai/Step3-VL-10B-FP8","title":"stepfun-ai/Step3-VL-10B-FP8","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"stepfun","name":"StepFun","category":"neolab"},"occurred_at":"2026-02-02T06:58:16+00:00","first_seen_at":"2026-06-06T01:49:42.562564+00:00","date_source":"source"},{"id":"8dfff472-9670-4ad2-b0b3-3e52cad3178f","url":"https://onlylabs.fyi/signals/8dfff472-9670-4ad2-b0b3-3e52cad3178f","source_url":"https://huggingface.co/stepfun-ai/Step-3.5-Flash","title":"stepfun-ai/Step-3.5-Flash","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"stepfun","name":"StepFun","category":"neolab"},"occurred_at":"2026-02-01T08:03:45+00:00","first_seen_at":"2026-06-06T01:49:42.562564+00:00","date_source":"source"},{"id":"32432450-8ccf-4dda-ac3b-cb7fee5caee8","url":"https://onlylabs.fyi/signals/32432450-8ccf-4dda-ac3b-cb7fee5caee8","source_url":"https://huggingface.co/stepfun-ai/Step-Audio-R1.1","title":"stepfun-ai/Step-Audio-R1.1","context":null,"kind":{"key":"model_released","label":"Model"},"org":{"slug":"stepfun","name":"StepFun","category":"neolab"},"occurred_at":"2026-01-14T06:37:24+00:00","first_seen_at":"2026-06-06T01:49:42.562564+00:00","date_source":"source"}]}