Born for Agent, Step 3.5 Flash releases the open source base model

February 2 News.Step StarThe latest, most powerful open source under the flag was releasedBase base model Step 3.5 Flash, officially known as having strong reasoning skills and Agent Smart, born for Agent。

performance vs model size

1AI HAS THE FOLLOWING OFFICIAL DESCRIPTION:

• The core highlights are as follows:

• FASTER: HIGHEST REASONING 350 TPS
• Stronger: Compared closed-source models to Agent scenes and mathematical missions
• Stabler: qualified for complex, long chain tasks

• We need not only “smarter” models, but also “trustworthy”, “fast-response”, and “cost-controllable” models. Step 3.5 Flash is here for this reason. We use:

• Rare MoE structure: each token only activates about 11 billion parameters (total 1960 billion parameters)
• MTP-3: Model one-time projection 3 Token, double efficiency
• 3:1: Slide Window with Global Attention (SWA + Full Attention): Focus only in long text, significantly lower calculation costs and efficiently handle 256K context

Step 3.5 Flash is now fully online, and the official report also states that the Step 4 model training has been initiated and that you are invited to participate in the creation of a joint venture。