StepFun

⚡️ 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: github.com/stepfun-ai/Ste… HuggingFace: huggingface.co/stepfun-ai/Ste… GGUF: huggingface.co/stepfun-ai/Ste… ModelScope: modelscope.cn/models/stepfun… API: platform.stepfun.ai Blog: static.stepfun.com/blog/step-3.7-…

@sheriyuo Thank you!!

Keep cooking 🙌

@shamimai1 @OpenRouter Thank you!

@StepFun_ai @OpenRouter That’s great

Step 3.7 Flash is currently top 10 on @OpenRouter this month, with 4.29T tokens routed. Builders are pushing it through real agent runs, coding tasks, and long-context workflows. Keep sending the hard stuff.

@embw_l0x @OpenRouter great to hear that !!

@StepFun_ai @OpenRouter Its a banger got the IQ4 XS running on macbook pro 128gb

@5fakb48 @NousResearch We started in 2023, and yes - foundation and multimodal models have been our focus from day one.

@StepFun_ai @NousResearch :)) I was curious how long ago did you guys begin work on large language models and was it the companies primary business?

Been great seeing Step 3.7 Flash get real use in Nous Portal: people testing, building, and running all kinds of agent workflows with it. We’re keeping free access going with the @NousResearch! Try it out and send us what you make.

@5fakb48 @NousResearch We are happy to let more Hermes users use our models for their agent workflows.

@StepFun_ai @NousResearch Absolutely based for you to extend the free period, the data you guys will get will be super worth it ty

@wassollichhier That's great to hear!

@StepFun_ai Cant wait on an updated variant. For now, 3.7 is my daily driver on my rig

Step 3.7 Flash hits #2 on Claw-Eval General for autonomous agents. We’re seeing strong performance across multi-step execution and robustness in long-horizon tasks, ranking just behind Claude Opus 4.6. Promising signals for real-world agent workloads.

@Teknium Thanks Teknium! Great to see people building on top of Step 3.7 Flash. We heard a lot of positive feedback from the community. We’ve extended the free access so the Hermes community can keep experimenting and shipping. More to come soon.

Keep on building, friends! Enjoy, @StepFun_ai’s model was going to end its free run tonight but they were awesome enough to extend it another two weeks!

@0xSero Appreciate it!

Fits on a spark and is the #1 model for it based on our benchmarks

@pdlclay sure, please contact @FrankYouChill

@StepFun_ai The best model too bad I forgot to renew and now I can't sign again, help me please

@NVamsick thanks!

@StepFun_ai For fast execution u r the best

Claw-eval Link: claw-eval.github.io

This is the kind of agent workflow Step Plan was built for: connect it once, push through a real build, and keep experimenting without thinking about every single API call. Love the tarot generator demo. Thanks for testing Step 3.7 Flash in Claude Code, @codedailyML 🙌

@thetripathi58 Love this walkthrough. Agent builders should spend more time shipping, and less time checking dashboards. Thanks for putting Step Plan and Step 3.7 Flash through a real workflow 🙌

I almost stopped testing new models altogether. Not because they were bad. Because every call left a number climbing in the corner of my screen, and at some point I started watching that number more than I was building. A flat-rate backend fixed that for agent work. I swapped my Claude Code setup to it in under 5 minutes. Here's how:

This is the pain we kept hearing from builders: once an agent starts doing real work, the meter becomes part of the workflow. Step Plan is our attempt to make that less of a distraction. Thanks for putting Step Plan + Step 3.7 Flash through a real Claude Code setup 🙌

@noor_tekk thanks, we fixed it

@StepFun_ai hi, your form is broken!

Introducing the StepFun Startup Program. We’re supporting early-stage AI teams building real products with StepFun models — from multimodal applications to agentic systems. Selected startups may receive API credits, dedicated ecosystem support, co-marketing opportunities, showcase placement, and warm introductions to selected partners. We’d love to hear what you’re building. Apply now 👇 platform.stepfun.ai/startup-program

@cheeez42 Sorry about that. Please try it again.

@StepFun_ai Was trying to apply, but it will not let me submit. Just gives me "Submission failed, please retry. Your answers are saved."