Ailing Teng

GM, Developer Business @StepFun

[Ailing Teng @EileenTal]

Great panel today at BEYOND ClawCon Macao on Building AI Agents for the Real World.
My biggest takeaway: agents are moving from demos to production, and the hard part is no longer just capability — it’s reliable execution.

[Ailing Teng @EileenTal]

Today at BEYOND ClawCon Macao, I shared our view on the next phase of model competition:The new frontier is agent efficiency.
Not just intelligence.But the ability to get real-world agentic work done — reliably, efficiently, and at scale.
That’s the thinking behind Step 3.7 Flash

[StepFun @StepFun_ai]

⚡️ Step 3.7 Flash is here: The new frontier is agent efficiency.

#1 ClawEval-1.1 (67.1), #1 SimpleVQA Search (79.2), #2 SWE-PRO (56.3), 95.3 on V* Python. Open weights under Apache 2.0.

Built for agentic, coding, search, and multimodal workflows — balancing speed, cost, and reliable execution.

- 400 TPS. 198B sparse MoE, ~11B active. 256K context, 3 reasoning levels.
- Understands UIs, charts, docs, images — then writes code or calls tools to act on what it sees.
- Web + visual search reaches further: more sources, deeper follow-up.
- Reliable tool use — less drift, fewer broken toolcalls. 98%+ on τ²-bench across all difficulty levels.
- Works with Claude Code, KiloCode, Hermes Agent, OpenClaw, and protocols like MCP.
- Runs locally on Mac Studio M4 Max, DGX Spark, AMD AI Max+ 395.

GitHub: https://t.co/kqlZkVIRHv
HuggingFace: https://t.co/qqceCrgPiw
GGUF: https://t.co/rR6XrnymWG
ModelScope: https://t.co/wney6Tzvqy
API: https://t.co/RvHWzRG7Fu
Blog: https://t.co/BxDiajiQ5G

[Ailing Teng @EileenTal]

@tbdryan Happy B-day

[StepFun @StepFun_ai]

Welcome, another 3.5 Flash 👋

[StepFun @StepFun_ai]

10 days wasn't enough.

Step 3.5 Flash⚡ is back on @NousResearch Portal
free for the next 15 days!

[StepFun @StepFun_ai]

Google I/O week pulls the AI builder world into the Bay Area.

We're powering SEAMATE x Linkloud's Front Row meetup on May 16, a builder-only room of ~500 founders & devs working on agents, multimodal, and AI-native infra.
Our team is on the "Apps That Agents Actually Use" panel with Principle and Google.

Plug and Play, Sunnyvale. May 16, 3pm.
If you're in town, come say hi!
https://t.co/p5BoJwfTH7

[Ailing Teng @EileenTal]

#MyXAnniversary

[Ailing Teng @EileenTal]

StepFun’s first Silicon Valley event is happening during SaaStr Week.

No long panels. No formal stage. Just people building, sharing, and connecting.

Step out of the conference floor.
StepFun in.

RSVP: https://t.co/CeinYSg6nn

[StepFun @StepFun_ai]

Step Out. StepFun In. 🍕🍺

We’re hosting a Founder mixer during SaaStr week in San Mateo with SEAMATE!
AI founders, SaaS builders, operators, investors — open mic, dinner, open bar 'til 9.

May 12 · 5:30 PM PT
RSVP → https://t.co/wWzUDyjixq

[Ailing Teng @EileenTal]

Thanks

[StepFun @StepFun_ai]

Step 3.5 Flash⚡ now live on @NousResearch Portal, free for 10 days!
Big thanks to the Nous team, it’s been awesome working with you.

Excited to see what the community ships🔥

[Ailing Teng @EileenTal]

In Silicon Valley this May.
Mostly excited to talk models, agents, developer tools, product, and startups — especially the gap between model demos and products people actually use.
Founders, builders, researchers— say hi if you’re around the Bay Area.

[Ahmad @TheAhmadOsman]

I have been sleeping on StepFun 3.5

WHAT A BEAST

[Ailing Teng @EileenTal]

@alexdolbun @TheAhmadOsman 3.6 will do

[StepFun @StepFun_ai]

Quick update! Thanks to everyone using Step 3.5 Flash. The response has been amazing.
For those who want more: paid channels now get a dedicated fast lane at 100+ tokens/s — that includes Step Plan and OpenRouter paid API.
Free tier speed stays as is. When you're ready to go faster, Step Plan starts at $6.99/mo.
https://t.co/lmZtnHwSTb

[Ailing Teng @EileenTal]

@JustinLin610 Thanks Lin and Qwen

[StepFun @StepFun_ai]

we're seeing more and more agents built on Step 3.5 Flash through @openclaw — and we love it.
to help you get started, here's our OpenClaw cookbook 👇
🔗 https://t.co/QKAvVytZzW

[ModelScope @ModelScope2022]

Step 3.5 Flash is now open source: model weights and full training framework (SteptronOSS), released together.🚀
196B total, 11B active. SWE-bench Verified 74.4% / Terminal-Bench 2.0 51.0%.

- MoE architecture: 288 routed experts + 1 shared, Top-8 activation per token
- MTP-3: predicts 4 tokens per forward pass, 100–300 tok/s typical, 350 tok/s peak
- 3:1 SWA ratio (1 full attention + 3 sliding window layers): 256K context at lower compute cost
- 💻 Runs on Mac Studio M4 Max and NVIDIA DGX Spark
- SteptronOSS: SFT, continued pretraining, RL (WIP)
- Apache 2.0

Two checkpoints released: Step-3.5-Flash-Base and Step-3.5-Flash-Base-Midtrain.

🤖 Base: https://t.co/yjiMeePKb0
🤖 Midtrain: https://t.co/K2W2lPONi1
🔧 Training Framework: https://t.co/PGnlo1AM1V
📄 Paper: https://t.co/7AQwj3XFbT

[Ailing Teng @EileenTal]

Now

[StepFun @StepFun_ai]

AMA is live! 🙌 Our team (including CEO, CTO & Chief Scientist) is answering your questions on r/LocalLLaMA today 8-11 AM PST. Jump in 👇
https://t.co/4q6YfxbTKr

[Ailing Teng @EileenTal]

Thanks for the love.

[StepFun @StepFun_ai]

You got Step 3.5 Flash trending on OpenRouter — even with tight limits. We noticed 👀

So we bumped it up 10x: 1K → 10K calls/day.

Thanks for the love 🙏

[Ailing Teng @EileenTal]

@yupp_ai Thanks for trying it! Let us know how it goes😊

[Yupp @yupp_ai]

Are you ready to give Step 3.5 a try? It's ready to prompt on Yupp, alongside over 900 top AIs from all over the world.

Want to show off what you're building? Prompt with friends in our lively, global Discord.

Links 🔗 in bio!