---
format: "aidr-story-markdown/v1"
id: "cb9a2e8230f3bd687eae4917f4b11d46e540b90c577cc0e12ae4e845122d89dd"
canonical_url: "https://aidr.today/cb9a2e82?lang=en"
title: "StepFun Debuts 600B Parameter Step 5 AI on OpenRouter"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-10-08T14:53:52.000Z"
category: "Tools"
topics: ["llm","devtools"]
source_urls: ["https://marketbrief.now/ai/stepfun-debuts-600b-parameter-step-5-ai-on-openrouter-56df51a8","https://huggingnews.com/ai/stepfun-debuts-600b-parameter-step-5-ai-on-openrouter-56df51a8"]
summary: "StepFun launched the Step 5 Preview model, a 600B parameter sparse Mixture of Experts AI with a 1M context window, now available on OpenRouter with optimization for finance and coding tasks."
---

# StepFun Debuts 600B Parameter Step 5 AI on OpenRouter

> [Open the canonical story](<https://aidr.today/cb9a2e82?lang=en>)

**Published:** 2026-10-08T14:53:52.000Z
**Category:** Tools
**Topics:** llm, devtools

## Summary

StepFun launched the Step 5 Preview model, a 600B parameter sparse Mixture of Experts AI with a 1M context window, now available on OpenRouter with optimization for finance and coding tasks\.

## Sources

- [Story source](<https://marketbrief.now/ai/stepfun-debuts-600b-parameter-step-5-ai-on-openrouter-56df51a8>)
- [Story source](<https://huggingnews.com/ai/stepfun-debuts-600b-parameter-step-5-ai-on-openrouter-56df51a8>)