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Qwen 3.5 Plus

Qwen 3.5 Plus is Alibaba's advanced multimodal model combining a context window of 1M tokens with strong scientific reasoning, visual analysis, and adaptive tool use for complex agentic workflows.

Vision (Image)Explicit CachingFile InputReasoningTool Use
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'alibaba/qwen3.5-plus',
  prompt: 'Why is the sky blue?'
})
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Frequently Asked Questions

  • How does Qwen 3.5 Plus differ from Qwen3.5-Flash on AI Gateway?

    Plus is tuned for maximum accuracy and deeper reasoning on complex tasks, while Flash prioritizes low latency and cost efficiency. Both share the context window of 1M tokens and multimodal inputs. Per-token rates differ by tier.

  • What kind of visual reasoning can Qwen 3.5 Plus perform?

    The model can analyze images, video frames, and interleaved visual-text content natively, making it suited for interpreting UI screenshots, scientific diagrams, data visualizations, and video-based question answering.

  • Can Qwen 3.5 Plus generate code from images or design files?

    Yes. A primary use case highlighted is converting visual specifications, such as wireframes, mockups, or screenshots, into functional frontend code.

  • Does the model support autonomous tool use during a session?

    Yes. Qwen 3.5 Plus includes adaptive tool-calling capabilities that let it decide when to invoke registered external tools, APIs, or search functions during a multi-turn agentic session.

  • What is the maximum context the model can handle in a single request?

    The hosted Plus tier supports input of up to 1M tokens by default, enabling entire codebases, books, or large document collections to be passed without retrieval preprocessing.

  • How is the configurable reasoning depth useful?

    Teams can increase reasoning depth for tasks like mathematical proofs or multi-document synthesis, or reduce it for simpler extraction tasks to lower latency and token spend.

  • Is Qwen 3.5 Plus available without a separate Alibaba account?

    Yes. No separate Alibaba or Model Studio account is required. AI Gateway handles authentication through its API key or OIDC token system.