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Average Ratings 0 Ratings

Total
ease
features
design
support

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Write a Review

Description

Qwen3.5 represents a major advancement in open-weight multimodal AI models, engineered to function as a native vision-language agent system. Its flagship model, Qwen3.5-397B-A17B, leverages a hybrid architecture that fuses Gated DeltaNet linear attention with a high-sparsity mixture-of-experts framework, allowing only 17 billion parameters to activate during inference for improved speed and cost efficiency. Despite its sparse activation, the full 397-billion-parameter model achieves competitive performance across reasoning, coding, multilingual benchmarks, and complex agent evaluations. The hosted Qwen3.5-Plus version supports a one-million-token context window and includes built-in tool use for search, code interpretation, and adaptive reasoning. The model significantly expands multilingual coverage to 201 languages and dialects while improving encoding efficiency with a larger vocabulary. Native multimodal training enables strong performance in image understanding, video processing, document analysis, and spatial reasoning tasks. Its infrastructure includes FP8 precision pipelines and heterogeneous parallelism to boost throughput and reduce memory consumption. Reinforcement learning at scale enhances multi-step planning and general agent behavior across text and multimodal environments. Overall, Qwen3.5 positions itself as a high-efficiency foundation for autonomous digital agents capable of reasoning, searching, coding, and interacting with complex environments.

Description

Step 5 Preview represents the pinnacle of StepFun’s offerings for agentic tasks, tailored specifically for real-world applications in both software engineering and professional knowledge domains, excelling particularly in financial contexts. The model is equipped to handle inputs of text, images, and videos while boasting a substantial 1M-token context window, which is ideal for tasks that necessitate extensive information, tool usage, and ongoing progress towards achieving specific deliverables. It possesses the ability to scrutinize lengthy documents, integrate various source materials, and utilize conversation histories for effective cross-document question answering and organizing research. In the realm of programming and software development, it is proficient in multiple programming languages and capable of assisting with debugging, code modifications, verification processes, and the generation of tests. Furthermore, its advanced multi-step agent functionalities empower applications to access tools for information retrieval, document processing, in-depth research, and the creation of analytical reports. Additionally, the model's multimodal comprehension allows for the synthesis of images, videos, and text, enabling tasks such as analyzing charts and answering questions based on screenshots. Ultimately, this comprehensive capability suite positions Step 5 Preview as an invaluable asset for professionals across various sectors.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

Alibaba Cloud Model Studio Yes 
Ollama Yes 
OpenClaw Yes 
Qwen Yes 
APIFree Yes 
BaseRT Yes 
Cline No 
ClinePass No 
Hermes Agent No 
Hugging Face No 
Model Context Protocol (MCP) No 
ModelScope No 
Odysseus No 
Python No 
Qwen Studio No 
Qwen3.5-Plus Yes 
QwenCloud No 
QwenWork No 
Together AI Yes 
ZooClaw Yes 

Integrations

Alibaba Cloud Model Studio Yes 
Ollama Yes 
OpenClaw Yes 
Qwen Yes 
APIFree No 
BaseRT No 
Cline Yes 
ClinePass Yes 
Hermes Agent Yes 
Hugging Face Yes 
Model Context Protocol (MCP) Yes 
ModelScope Yes 
Odysseus Yes 
Python Yes 
Qwen Studio Yes 
Qwen3.5-Plus No 
QwenCloud Yes 
QwenWork Yes 
Together AI No 
ZooClaw No 

Pricing Details

Free
Open source
Free Trial No 
Free Version Yes 

Pricing Details

$0.04 per input
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises Yes 
iPhone App No 
iPad App No 
Android App No 
Windows Yes 
Mac Yes 
Linux Yes 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Alibaba

Founded

1999

Country

China

Website

qwen.ai

Vendor Details

Company Name

StepFun

Founded

2023

Country

United States

Website

platform.stepfun.ai/docs/en/guides/models/step-5-preview

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