step-5-preview
step-5-preview is Hugging Face. It is ranked #618 on the Dev Radar, in Other, first seen 15 days ago and shared in 13 posts (168k views).
What step-5-preview says about itself
Machine learning model with 604B parameters. Download, explore files and run it on Hugging Face.
stepfun-ai/Step-5-Preview · Hugging Face Hugging Face Log In Sign Up ","eos_token":"<|im_end|>","pad_token":"<｜end▁of▁sentence｜>","unk_token":null,"use_default_system_prompt":false},"chat_template_jinja":"{% macro render_message_content(message) %}{% if message.content is none %}{{- '' }}{% elif message.content is string %}{{- message.content }}{% elif message.content is mapping %}{{- message.content['value'] if 'value' in message.content else message.content['text'] }}{% elif message.content is iterable %}{% set ns = namespace(needs_text_separator=false) %}{% for item in message.content %}{% if item.type == 'text' %}{% if…
What people said about step-5-preview on X
Step 5 Preview is now open weights. BF16 and FP8 weights are live on Hugging Face and ModelScope, together with our technical blog. • Sparse MoE: 600B total, 27B active per token • 1M-token context window • Native text and vision input • Built for long-horizon agentic work: coding, software engineering, professional…
— @StepFun_ai, 15 days ago · 973 likes · see the post
Congrats to StepFun on Step 5 Preview 🙌 Their largest open weights release. The 600B MoE model is built to handle agent tasks lasting up to 24 hours. The model runs at nearly 8K tokens/sec/GPU on NVIDIA GB300 using NVFP4. NVP4 checkpoint: https://huggingface.co/stepfun-ai/Step-5-Preview-NVFP4 Deploy with…
— @NVIDIAAI, 15 days ago · 412 likes · see the post
it doesn't even include Opus 5.5 and it looks pretty brutal for chinese models (and Fable 5.5 and the next Astra are both ready too)
— @scaling01, 14 days ago · 234 likes · see the post
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step-5-preview in numbers
- Rank on the Dev Radar: #618 of 8801
- Shared in 13 posts by 13 accounts: @StepFun_ai, @NVIDIAAI, @scaling01, @MiaAI_lab
- 168k views on those posts
- First seen 15 days ago, last shared 11 days ago
- Pricing seen by AGK Intelligence: not stated
- Market: Other
FAQ
What is step-5-preview?
Hugging Face It was first shared on X 15 days ago and is ranked #618 on the Dev Radar.
Is step-5-preview free?
Pricing is not stated on the page we read.
Who shared step-5-preview?
13 accounts on X, including @StepFun_ai, @NVIDIAAI, @scaling01, in 13 posts totalling 168k views.
Every post is read and classified by AGK Intelligence: what it is, which market it belongs to, and whether the link is a real tool. 31.2k posts from 5k X accounts over the last 21 days, 8.8k tools, 12 markets. New posts are collected several times an hour and the full ranking is recomputed every hour — last update 2026-10-30 21:12 UTC. Full method.