Step-3.7-Flash

by stepfun-ai

Apache-licensed multimodal MoE for image-text reasoning and fast visual QA

9.3Kdl/month

MoEparams

HuggingFace Use in Pipeline

Identifiers

Model ID

stepfun-ai/Step-3.7-Flash

Feature URI

mixpeek://image_extractor@v1/stepfun_step37_flash_v1

Overview

Step 3.7 Flash is a new multimodal Mixture-of-Experts model from StepFun with image-text-to-text support. It is notable because the model card ships with Transformers and vLLM usage, making it more practical for teams that want a deployable open VLM rather than an API-only model.

On Mixpeek, Step 3.7 Flash is a candidate for scene captioning, visual question answering, screenshot analysis, and agent perception tasks where a single model needs to reason over images plus instructions.

Architecture

Vision-language Mixture-of-Experts model exposed through custom Transformers code and vLLM. Supports image-text chat prompts with Apache 2.0 licensing.

Mixpeek SDK Integration

import { Mixpeek } from "mixpeek";

const mx = new Mixpeek({ apiKey: "API_KEY" });

await mx.collections.ingest({
  collection_id: "media-library",
  source: { url: "https://example.com/keyframe.jpg" },
  feature_extractors: [{
    feature: "scene_caption",
    model: "stepfun-ai/Step-3.7-Flash"
  }]
});