Qwen3.8 Flash

SyncDev model directory · Profile updated Oct 13, 2026

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Qwen3.8 Flash is a managed multimodal model with a one-million-token context, tool calling and structured output support.

Key specifications

Specification score
66.7
Context window
1M
Input / 1M tokens
$0.15
Output / 1M tokens
$0.47
License
Publisher API terms

The specification score summarizes recorded features and limits. It is not a benchmark result.

Inputs and outputs

Recorded modality support shows what this model can accept and produce. An undocumented modality is shown as unknown rather than assumed to be unsupported.

Accepts

  • Text input
  • Image input
  • Video input

Produces

  • Text output

Capabilities

ReasoningFunction callingVisionStreamingJSON mode

What is Qwen3.8 Flash?

Qwen3.8 Flash is a managed multimodal model with a one-million-token context, tool calling and structured output support.

Managed features

Qwen Cloud documents this service for long-context work with tool calls, structured responses, prompt caching and batch processing. It is based on the Flash Next checkpoint, but the hosted interface is a separate deployment choice. Use the service’s API identifier and documentation when configuring a client rather than copying a local checkpoint’s serving settings.

Workloads to test

Start with a support question over several supplied documents, a code change with a failing test and a tool sequence with a verifiable final state. Require the answer to refer to the supplied evidence and check any structured output with an application-side validator. For an agent, review tool selection and recovered errors as well as the final prose.

Pricing and caching

The Qwen Cloud model page displays $0.15 per million input tokens and $0.47 per million output tokens, with cached-input pricing shown separately. These prices belong to that hosted route. Repeated prompts, cache creation, reasoning and failed attempts can change the total cost of a completed task. Measure a representative conversation using the API’s reported usage before extrapolating a budget. When comparing this service with Flash Next on your own infrastructure, include the cost of maintaining the local runtime, concurrency and long-context memory rather than comparing only download availability with API token prices.

Sources

Publisher documentation

How to evaluate Qwen3.8 Flash

Compare the model on the work you need to complete.

Tasks and inputs

Qwen3.8 Flash is listed for Image-text-to-text, Text generation, Video-text-to-text. It accepts text, image, video and produces text. Use the publisher’s input format and preprocessing for your chosen deployment.

Capacity and cost

Documented limits: 1M context. The listed route charges $0.15 input and $0.47 output per million tokens. Measure a completed task using the prompts, documents and tools your application will use. Include reasoning and retries in the result.

Choosing a deployment

Use the model identifier and account requirements for the selected API route. Confirm its request limits and output format with one complete task before connecting a larger workflow.

These records share a directory category. Check the source card, output type and deployment requirements before treating a model as a replacement.

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