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Qwen: Qwen3.8 Flash

qwen3.8-flash

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Qwen3.8 Flash costs $0.195 per million input tokens and $0.611 per million output tokens, supports 1M context, and is available through the OpenAI-compatible API.

Qwen3.8 Flash is Alibaba's latest fast multimodal model, with a million-token context window for coding, agentic workflows, visual understanding, long documents, codebases, and videos.

Modalities

Text + Image + Video → Text

Input / output price

$0.195 / $0.611 per 1M

Context

1M · max output 131K

Capabilities

ReasoningVisionTool callingLong contextOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$0.195
Output$0.611
Cached input$0.0208

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00107
Per day
$0.5369
Per month (30 days)
$16.11

Qwen3.8 Flash: input $0.195/M · output $0.611/M · cached input $0.0208/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "qwen3.8-flash", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to qwen3.8-flash.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen3.8-flash",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is Qwen3.8 Flash billed?
Input is $0.195 and output is $0.611 per million tokens; cached input is $0.0208. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
1M tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
Qwen3.8 Flash API pricing · GeniusRelay