Qwen3.5Alibaba
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Step 5 PreviewStepFun
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Related Products
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About
Qwen3.5 is a next-generation open-weight multimodal large language model designed to power native vision-language agents. The flagship release, Qwen3.5-397B-A17B, combines a hybrid linear attention architecture with sparse mixture-of-experts, activating only 17 billion parameters per forward pass out of 397 billion total to maximize efficiency. It delivers strong benchmark performance across reasoning, coding, multilingual understanding, visual reasoning, and agent-based tasks. The model expands language support from 119 to 201 languages and dialects while introducing a 1M-token context window in its hosted version, Qwen3.5-Plus. Built for multimodal tasks, it processes text, images, and video with advanced spatial reasoning and tool integration. Qwen3.5 also incorporates scalable reinforcement learning environments to improve general agent capabilities. Designed for developers and enterprises, it enables efficient, tool-augmented, multimodal AI workflows.
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About
Step 5 Preview is StepFun’s flagship model for agentic work, designed for real-world tasks across software engineering and professional knowledge work, with particular strength in finance. It natively supports text, image, and video input and provides a 1M-token context window, enabling tasks that require large amounts of information, tool calls, and continuous progress toward a deliverable. The model can analyze long documents, multiple source materials, and conversation history for cross-document question answering and research organization. For programming and software engineering, it works across multiple languages and can support troubleshooting, code changes, verification, and test creation. Its multi-step agent capabilities let applications provide tools for retrieving information, processing documents, conducting deep research, and producing analytical reports. Multimodal understanding combines images, video, and text for chart analysis, screenshot question answering, etc.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
AI researchers, enterprise developers, and organizations seeking an efficient open-weight multimodal foundation model for advanced reasoning, coding, and autonomous agent applications
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Audience
Developers, engineering teams, and knowledge-work organizations wanting to build multimodal AI agents for coding, research, analysis, and other complex multi-step tasks
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
Free
Open source
Free Version
Free Trial
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Pricing
$0.04 per input
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationAlibaba
Founded: 1999
China
qwen.ai
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Company InformationStepFun
Founded: 2023
United States
platform.stepfun.ai/docs/en/guides/models/step-5-preview
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Alternatives |
AlternativesNo Alternatives
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Categories |
Categories |
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Integrations
Alibaba Cloud Model Studio
Ollama
OpenClaw
Qwen
APIFree
BaseRT
Claw Code
ClinePass
Happy Shrimp 1.0
Hermes Agent
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Integrations
Alibaba Cloud Model Studio
Ollama
OpenClaw
Qwen
APIFree
BaseRT
Claw Code
ClinePass
Happy Shrimp 1.0
Hermes Agent
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