{"schema_version":"onlylabs.public_signal.v1","title":"StepFun Model: stepfun-ai/Step-3.5-Flash","description":"StepFun model signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/8dfff472-9670-4ad2-b0b3-3e52cad3178f","json_url":"https://onlylabs.fyi/signals/8dfff472-9670-4ad2-b0b3-3e52cad3178f/signal.json","generated_at":"2026-06-11T02:49:45.490552+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/8dfff472-9670-4ad2-b0b3-3e52cad3178f","signal_json":"https://onlylabs.fyi/signals/8dfff472-9670-4ad2-b0b3-3e52cad3178f/signal.json","source":"https://huggingface.co/stepfun-ai/Step-3.5-Flash","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/Step-3.5-Flash. 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charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T02:49:45.490552+00:00","bytes":26241,"raw_path":"bfd70d31e7e8ff6ddf734950cc7f4fe1dc0b29f96751fa2b06059e2aab0946a1.md","content_hash":"6b903e2816900a43ec28d4a8f0f5c2feb72f7c65945cad503375414a270751d2","excerpt_chars":1200,"truncated":true,"excerpt":"--- license: apache-2.0 base_model: - stepfun-ai/step-3.5-flash library_name: transformers --- Step 3.5 Flash <div align=\"center\"> <div align=\"center\" style=\"display: flex; justify-content: center; align-items: center;\"> <img src=\"stepfun.svg\" width=\"25\" style=\"margin-right: 10px;\"/> <h1 style=\"margin: 0; border-bottom: none;\">Step 3.5 Flash</h1> </div> [![GitHub](https://img.shields.io/badge/GitHub-181717?style=flat&logo=github&logoColor=white)](https://github.com/stepfun-ai/Step-3.5-Flash) [![Hugging Face](https://img.shields.io/badge/%F0%9F%A4%97%20HF-StepFun/STEP3p5-preview)](https://huggingface.co/stepfun-ai/Step-3.5-Flash) [![ModelScope](https://img.shields.io/badge/ModelScope-StepFun/STEP3p5-preview)](https://modelscope.cn/models/stepfun-ai/Step-3.5-Flash) [![Discord](https://img.shields.io/badge/Discord-Join-5865F2?logo=discord&logoColor=white)](https://discord.gg/RcMJhNVAQc) [![Webpage](https://img.shields.io/badge/Webpage-Blog-blue)](https://static.stepfun.com/blog/step-3.5-flash/) [![Paper](https://img.shields.io/badge/Arxiv-TechReport-red)](https://arxiv.org/abs/2602.10604) [![License](https://img.shields.io/badge/License-Apache%202.0-green)]() [![Chat with the model..."},"evidence_pages":[{"url":"https://huggingface.co/stepfun-ai/Step-3.5-Flash/raw/main/README.md","final_url":"https://huggingface.co/stepfun-ai/Step-3.5-Flash/raw/main/README.md","title":"stepfun-ai/Step-3.5-Flash model card","http_status":200,"content_type":"text/plain; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T02:49:45.490552+00:00","bytes":26241,"raw_path":"bfd70d31e7e8ff6ddf734950cc7f4fe1dc0b29f96751fa2b06059e2aab0946a1.md","content_hash":"6b903e2816900a43ec28d4a8f0f5c2feb72f7c65945cad503375414a270751d2","excerpt_chars":1200,"truncated":true,"excerpt":"--- license: apache-2.0 base_model: - stepfun-ai/step-3.5-flash library_name: transformers --- Step 3.5 Flash <div align=\"center\"> <div align=\"center\" style=\"display: flex; justify-content: center; align-items: center;\"> <img src=\"stepfun.svg\" width=\"25\" style=\"margin-right: 10px;\"/> <h1 style=\"margin: 0; border-bottom: none;\">Step 3.5 Flash</h1> </div> [![GitHub](https://img.shields.io/badge/GitHub-181717?style=flat&logo=github&logoColor=white)](https://github.com/stepfun-ai/Step-3.5-Flash) [![Hugging Face](https://img.shields.io/badge/%F0%9F%A4%97%20HF-StepFun/STEP3p5-preview)](https://huggingface.co/stepfun-ai/Step-3.5-Flash) [![ModelScope](https://img.shields.io/badge/ModelScope-StepFun/STEP3p5-preview)](https://modelscope.cn/models/stepfun-ai/Step-3.5-Flash) [![Discord](https://img.shields.io/badge/Discord-Join-5865F2?logo=discord&logoColor=white)](https://discord.gg/RcMJhNVAQc) [![Webpage](https://img.shields.io/badge/Webpage-Blog-blue)](https://static.stepfun.com/blog/step-3.5-flash/) [![Paper](https://img.shields.io/badge/Arxiv-TechReport-red)](https://arxiv.org/abs/2602.10604) [![License](https://img.shields.io/badge/License-Apache%202.0-green)]() [![Chat with the model..."}],"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":"59a33bc4-341e-4c3e-8230-749ae55f0530","url":"https://onlylabs.fyi/signals/59a33bc4-341e-4c3e-8230-749ae55f0530","source_url":"https://huggingface.co/stepfun-ai/NextStep-1.1-Pretrain-256px","title":"stepfun-ai/NextStep-1.1-Pretrain-256px","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"},{"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":"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"}]}