{"type":"analysis","id":"analysis:step-5-preview-plugs-into-claude-code-but-nothing-published-yet-shows-it-is-a","slug":"step-5-preview-plugs-into-claude-code-but-nothing-published-yet-shows-it-is-a","title":"Step 5 Preview plugs into Claude Code, but nothing published yet shows it is a drop-in swap","description":"StepFun's flagship agent model now comes as an API, as open weights and with Claude Code integration docs. Being compatible is not the same as being equivalent. With no independent evaluation, no pricing on the docs page and specs that disagree between sources, the swap still has to be tested.","published_at":"2026-10-27T11:00:00.000Z","updated_at":"2026-10-27T11:00:00.000Z","record_date":"2026-10-27","topics":["claude","claude_code","mcp"],"source_urls":["https://platform.stepfun.ai/docs/en/guides/models/step-5-preview","https://tsnmedia.org/stepfun-step-5-preview-open-weights","https://github.com/lyramakesmusic/neuron-explorer","https://github.com/fujibee/agmsg/releases/tag/v1.6.1","https://vercel.com/changelog/step-5-preview-now-available-on-ai-gateway"],"language":"en","routes":{"html":"https://newruntime.com/analysis/step-5-preview-plugs-into-claude-code-but-nothing-published-yet-shows-it-is-a/","markdown":"https://newruntime.com/analysis/step-5-preview-plugs-into-claude-code-but-nothing-published-yet-shows-it-is-a.md","json":"https://newruntime.com/analysis/step-5-preview-plugs-into-claude-code-but-nothing-published-yet-shows-it-is-a.json"},"author":{"role":"author","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"]},"editorial_provenance":{"desk":"authorial","target_ref":"story_cluster:stepfun-publishes-step-5-preview-api-model-specifications-c0cec1298538","authorial_article_id":"2aef80e6-3c92-46a5-ad8d-9f542300e9b7"},"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":"topic","path":"/topics/mcp/","url":"https://newruntime.com/topics/mcp/","title":"Mcp","reason":"Explore the mcp topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/mcp.md","json_url":"https://newruntime.com/topics/mcp.json"},{"type":"collection","path":"/analysis/","url":"https://newruntime.com/analysis/","title":"Analysis","reason":"Open the latest authorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/analysis.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"}]}