Member of Technical Staff, AI Safety @StepFun_ai, Vibe Coding Engineer, CyberSecurity Engineer
Singapore
Joined May 2017
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Jeremy Li retweeted
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 knowledge work and finance
Frontier intelligence, open weights. Build what's next.
Hugging Face: huggingface.co/stepfun-ai/St…
ModelScope: modelscope.ai/models/stepfun…
GitHub: github.com/stepfun-ai/Step-5…
Jeremy Li retweeted
Your next build is on us.
Step 5 Preview is now free in @opencode for one week. Our flagship model for agentic and professional work.
Keep your workflow. Switch your model.
Jeremy Li retweeted
Introducing Step Code v0.1.0.
Swift execution. High token efficiency. Long-horizon reliability.
Now open source under the MIT License.
Step Code handles the full development loop—from reading and editing code to running tests and shipping—from one CLI.
- 80.9% on Terminal-Bench 2.1 in evaluation
- 73.3% on Multi-Frame, our 150-task long-horizon benchmark
- One-command static site publishing with StepPage
GitHub: github.com/stepfun-ai/Step-C…
Have a try
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: platform.stepfun.ai
Model page: stepfun.com/step-5-preview
Open weights on Oct 15.
Jeremy Li retweeted
Introducing StepAudio 3, our new family of 5 audio models for real-time voice, speech recognition, speech generation, audio generation and music.
Realtime ranks #1 on Artificial Analysis for both Conversational Dynamics (98.9%) and Speech Reasoning (99.7%). ASR reaches 1.7% WER, matching the best result on the leaderboard.
Build voice agents that handle interruptions, reason while speaking, and call tools. Transcribe speech, generate expressive voices, and create full audio scenes and music.
Available now:
Voice AI Lab: audio.stepfun.ai/
Blog: static.stepfun.com/blog/step…
Jeremy Li retweeted
We’re bringing StepAudio 3 to San Francisco this Wednesday.
Live demos, an open AMA with the StepAudio team, and a panel with leaders from PLAUD.AI, Cresta, Coval, SGLang-Omni & StepFun on what works, what still breaks in production, and where real-time AI interaction is heading next.
📍 Sep 16 · SF
🎁 $100 API credits + drinks & light dinner
Join us ↓
luma.com/bkpe5h92
I recommend everyone give it a try—and by the way, I'm currently working on it now.
⚡️ 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/Step-3…
HuggingFace: huggingface.co/stepfun-ai/St…
GGUF: huggingface.co/stepfun-ai/St…
ModelScope: modelscope.cn/models/stepfun…
API: platform.stepfun.ai
Blog: static.stepfun.com/blog/step…
When I recently renovated a new house, I purchased Ubiquiti's network equipment to upgrade the basic network at home. So far everything is looking good!
Jeremy Li retweeted
The #DEFCON30 Call for Contests and Events is OPEN!
If you’ve got a stellar idea for a contest, this is your moment to turn your idea into a real DEF CON Experience.
Rules here:
defcon.org/html/defcon-30/dc…
Let’s see what you’ve got percolating out there, DEF CON fam.
Jeremy Li retweeted
Millions of #Microsoft web servers powered by vulnerable legacy software
securityaffairs.co/wordpress…
#securityaffairs #hacking
Jeremy Li retweeted
So, here is another gift for you about Imagemagick RCE 0-day that afftceted to GhostScript-9.50 😀
github.com/duc-nt/RCE-0-day-…
#RCE #imagemagick #ghostscript
Jeremy Li retweeted
Attackers are backpacking off internet-sharing applications (aka #proxyware) to spread malware and scam users out of their bandwidth and money. Find out about this new threat in our blog post cs.co/6018yapI4
Jeremy Li retweeted
New #mimikatz 🥝update is coming
Will be ready up to Server 2022 (and ~ready for Windows 11)
