# StepFun Step 5 Preview scores 44 on Artificial Analysis Intelligence Index at $0.71 per task

StepFun highlighted Artificial Analysis results putting Step 5 Preview at 44 on the Intelligence Index and $0.71 per task, with more to come on Oct 15. The evaluation describes a 600B/27B MoE flagship with first-party API access and open weights planned for October 15.

Language: en
Time zone: America/Los_Angeles
Current time (UTC, cached as of): 2026-11-10T07:01:00.000Z
Query date (America/Los_Angeles): 2026-11-09

HTML: https://didcodexreset.com/news/dba487e031f6495aac39f119.html

Content language: en
Localization state: sameLanguage

Source: StepFun · Published 9/21/2026, 20:06:22

StepFun quoted an Artificial Analysis evaluation of **Step 5 Preview**, saying the model scored **44** on the Artificial Analysis Intelligence Index at **$0.71 per task** and that more is coming on **Oct 15**.

According to Artificial Analysis, Step 5 Preview is StepFun’s new flagship: a **600B total / 27B active** MoE model with a **1M-token** context window, text, image and video input, and text output. It listed pricing at **$1 / $2.70 per 1M input/output tokens** (cached input **$0.05/M**), availability on StepFun’s first-party API, and **open weights planned for October 15**. Artificial Analysis put cost at about **$0.72 per Intelligence Index task**, matching Kimi K3 (max) at score 44 and about **2.8x lower** cost per task.

The evaluation said frontier reasoning was the largest jump from Step 3.7 Flash, including **46%** on Humanity’s Last Exam and **21%** on CritPt. It also reported **42%** AA-Omniscience accuracy with more hallucination than GLM-5.3, and said agentic scores lagged peers at a similar Intelligence Index level, including **1,566 Elo** on GDPval-AA.

Tags: StepFun, Step 5 Preview, Artificial Analysis, LLM, Open Weights

[View original post](https://x.com/StepFun_ai/status/2102231405606625507)