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Step 3.7 Flash

by StepFun

Try itWebsiteDocsGitHubHugging Face

Open-weights multimodal flash model from StepFun for agentic tasks involving images, interfaces, web search and long runs.

Available in EULanguage ModelsAgents & AutomationModel

Updated EU status checked Last shown

Step 3.7 Flash at a glance

What is Step 3.7 Flash?
Step 3.7 Flash is a model from StepFun. Open-weights multimodal flash model from StepFun for agentic tasks involving images, interfaces, web search and long runs.
Who makes Step 3.7 Flash?
Step 3.7 Flash is made by StepFun.
Does Step 3.7 Flash work in the EU?
Available in the EU. Open weights are downloadable from Hugging Face without a known regional restriction, though the license was not seen and no EU-specific terms were found. The hosted StepFun API has no confirmed EU data residency. Last verified 14 Nov 2026.
How much does Step 3.7 Flash cost?
Open source. Weights reported as open and free to download; hosted API pricing on the StepFun platform not confirmed.
Where was Step 3.7 Flash shown?
In 1 creator video by AI Search. Most recently by AI Search on 31 May 2026, at 22:04 in “Self-improving AI, Opus 4.8, Nvidia bangers, game-ready 3D models, juggling robots: AI NEWS”.

Sources: the vendor's own pages (linked above) and creator videos at the linked timestamps. EU status is information, not legal advice; see how we check.

About

Step 3.7 Flash is a multimodal model from StepFun (阶跃星辰), a Chinese AI lab founded in April 2023. It is positioned as a fast model for real-world agents that handle images, user interfaces, web search and long-running tasks.

According to a YouTube creator review, it approaches GPT 5.5 and Claude Opus 4.7 on SWE-Bench Pro. This is a secondhand claim and has not been verified against official material. The same review says the weights are around 400 GB, so local use requires hardware such as an NVIDIA DGX Spark or a multi-GPU setup.

The model is described as open source. StepFun publishes models on Hugging Face and GitHub, and offers hosted API access through its platform. The official pages fetched did not include a model card, license text, pricing or a release date, so those details are not confirmed here.

Key features
  • Multimodal input including images and user interfaces
  • Aimed at agentic workflows with web search and long runs
  • Reported to approach GPT 5.5 and Opus 4.7 on SWE-Bench Pro (creator claim)
  • Open weights, roughly 400 GB
  • Hosted API available via the StepFun platform
1 moment

As seen on YouTube

Watch the moment: the exact second top creators show it. Videos load only when you press play, via youtube-nocookie.com.

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