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Qwen: Qwen3.8 Max

qwen3.8-max

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Qwen3.8 Max costs $2.60 per million input tokens and $7.80 per million output tokens, supports 991K context, and is available through the OpenAI-compatible API.

Qwen3.8 Max is Qwen's 2.4T-parameter flagship model for coding, knowledge work, full-stack development, data analysis, and long-running agent workflows in non-thinking mode. It supports text, image and PDF input, tool calling, structured output, and a near-million-token context window.

Modalities

Text + Image → Text

Input / output price

$2.60 / $7.80 per 1M

Context

991K · max output 66K

Capabilities

VisionTool callingLong context

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$2.60
Output$7.80
Cached input$0.325

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.0140
Per day
$7.02
Per month (30 days)
$210.60

Qwen3.8 Max: input $2.6/M · output $7.8/M · cached input $0.325/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-max", "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-max.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen3.8-max",
    "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 Max billed?
Input is $2.60 and output is $7.80 per million tokens; cached input is $0.325. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
991K 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 Max API pricing · GeniusRelay