{"type":"post","id":"stepfun-has-published-api-documentation-for-step-5-e1edb8","slug":"stepfun-has-published-api-documentation-for-step-5-e1edb8","title":"StepFun has published API documentation for Step 5 Preview, model ID step-5-preview","description":"StepFun has published API documentation for Step 5 Preview, model ID `step-5-preview`, which it calls its flagship model for agentic work.","retrieval_nugget":"StepFun has published API documentation for Step 5 Preview, model ID `step-5-preview`, which it calls its flagship model for agentic work.","published_at":"2026-10-25","updated_at":"2026-10-25","record_date":"2026-10-25","date_kind":"published_at","topics":["claude","claude-code"],"entities":["StepFun","Step 5 Preview","Claude Code"],"related_patterns":[],"novelty_label":"new_fact","what_changed":"StepFun’s API documentation adds video input support and specifies a 64k-token maximum output for Step 5 Preview.","prior_refs":["memory:a0359227-dfeb-83e6-a9a2-7011661d701e","memory:63307161-e0b6-802d-ae00-4013dd4d0a53"],"source_url":"https://platform.stepfun.ai/docs/en/guides/models/step-5-preview","source_urls":["https://platform.stepfun.ai/docs/en/guides/models/step-5-preview"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:stepfun-has-published-api-documentation-for-step-5-e1edb8","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/stepfun-has-published-api-documentation-for-step-5-e1edb8/","markdown":"https://newruntime.com/posts/stepfun-has-published-api-documentation-for-step-5-e1edb8.md","json":"https://newruntime.com/posts/stepfun-has-published-api-documentation-for-step-5-e1edb8.json"},"next_reads":[{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"topic","path":"/topics/claude-code/","url":"https://newruntime.com/topics/claude-code/","title":"Claude Code","reason":"Explore the claude-code topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude-code.md","json_url":"https://newruntime.com/topics/claude-code.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}