RRRRRRRY

@StepFun_ai
ENTP-A Recent on sandbox
ACM Gold medal
Google|Bytedance²|Megvii|Airwallex
🍭🍬🥳✨☕️🍵🌶️

[RRRRRRRY @evio_wwww]

Stay tuned for more information.

Currently Publicly Available Information：

[StepFun @StepFun_ai]

Step 5 Preview pushes our intelligence–cost Pareto frontier outward.

It comes in at 44 on the Artificial Analysis Intelligence Index, $0.71 per task.

Thanks @ArtificialAnlys for putting Step 5 Preview through the full evaluation.

More to come on Oct 15.

[RRRRRRRY @evio_wwww]

@jakevin7 你快催tygg试一下😃😃😃

[RRRRRRRY @evio_wwww]

@Multi_Serio_Ai 可爱wwww

[RRRRRRRY @evio_wwww]

耶耶耶！感谢卡比！老伙计开心联动🥰🥰🥰🥰🥰🥰🥰🥰

[RRRRRRRY @evio_wwww]

@libinyaminAI 好！

[RRRRRRRY @evio_wwww]

嘻嘻嘻嘻嘻🥰🥰🥰🥰我们水十八也是务实聪明机灵小宝贝

[Applerin🍎 @ApplerinQAQ]

阶跃星辰的网感会不会有点太好了（

[RRRRRRRY @evio_wwww]

@libinyaminAI 🥺🥺🥺🥺🥺🥺🥺因为被喷了挺久了，但大家明明蛮努力的也做得很好

[RRRRRRRY @evio_wwww]

@zhngzhom1 后面应该还会持续优化，感谢关注和理解

[RRRRRRRY @evio_wwww]

We’ve been quiet for too long. It’s time for a change.

Over the past few months, we’ve been pushing toward the frontier, step by step. And now, things are finally coming together.

Welcome to StepFun. Come build better open models and more general agents with us!

[StepFun @StepFun_ai]

Introducing Step 5 Preview: Advancing the Pareto Frontier.

Step 5 Preview is our new flagship model for agentic work, delivering frontier-level performance across software engineering and professional knowledge work, with particular strength in finance.

- 600B total / 27B active MoE, with 1M context + Vision
- Substantially lower task cost at comparable intelligence
- Broad software engineering capabilities with sustained execution over long horizons

Try Step 5 Preview: https://t.co/fC7HHlWKFn
Model page: https://t.co/4caJR2YGD3

Open weights on Oct 15.

[RRRRRRRY @evio_wwww]

@MarkGerrardAI Really thanks for ur work

[RRRRRRRY @evio_wwww]

How about thiiiiiiiis！

[Applerin🍎 @ApplerinQAQ]

噢噢噢这个好可爱...！

[RRRRRRRY @evio_wwww]

@flyingpetal472 足够哥足够的

[RRRRRRRY @evio_wwww]

@buildwithhassan Try it

[RRRRRRRY @evio_wwww]

@zhngzhom1 现在再试试？

[RRRRRRRY @evio_wwww]

@liulicheng10 @FanqingMengAI 你怎么当他面一起吃饭的时候不说😃

[Yasmine @CyouSakura]

What Keeps Me Up At Night

[RRRRRRRY @evio_wwww]

Love this

[StepFun @StepFun_ai]

Step 5 Preview is built for professional knowledge work — from large-scale research to structured analysis and interactive reporting.

It coordinates research at scale and turns evidence into finished, auditable deliverables. In one agent action, it coordinated 950 web fetches and assembled 300,000 monthly records across 1,000 locations over 25 years; in another, it produced a 17-sheet analytical workbook with source reconciliation, formulas, and trend models.

Its outputs span technical engineering, creative production, analytical reporting, and public communication.

[RRRRRRRY @evio_wwww]

Stay tuned for more information.

Currently Publicly Available Information：

[StepFun @StepFun_ai]

Step 5 Preview works across software environments and sustains execution over long horizons.

Its capabilities extend from software engineering and web applications to 3D workflows and programmable hardware.

Over longer horizons, Step 5 Preview keeps track of prior results, uses execution feedback to decide what to try next, and continues iterating. We test this behavior in runs lasting up to 24 hours, including tasks involving GPU kernel optimization and automated post-training.

[RRRRRRRY @evio_wwww]

Hope u love this🥰🥰🥰🥰🥰

[J A Z I I @notjazii]

Stepfun just announced their new SOTA model

step 5 preview is a 600b model with only 27b active params, and early numbers are looking insane:

> 67.7 on deepswe
> beats gemini 3.8 flash
> 1m context window + image and video input
> $1 input and $2.70 output
> beats most of chinese models

it’s already available in api and chat, so you can play around if you want

already got access and running some tests now, will post results soon

which model should i test it against?