Alibaba QwenMediumUltra

Qwen3.8 Max (0902)

Alibaba's Qwen3.8 Max (0902) served through the OpenRouter aggregator - the updated snapshot of Qwen3.8 Max and the id OpenRouter now lists for it (since 2026-09-03), replacing qwen/qwen3.8-max. The flagship of the Qwen3.8 series, a 2.4-trillion-parameter mixture-of-experts multimodal reasoning model for complex reasoning, visual understanding, and agentic work with a 1M-token context, billed at OpenRouter's actual usage cost.

3,716/11,148credits

input / output · per 1M tokens

1M-token context window with up to 131K output tokens

Multimodal input (text, image, video) with reasoning mode

OpenAI-compatible API (chat completions) via /llm/openrouter/v1

Prompt caching with discounted cache reads

Billed at OpenRouter's actual usage.cost - listed rates are estimates

Run it right now

Test this model instantly in the Console Playground — no code required

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txtllms.txt ↗

Model Specifications

Context Window

tokens

Max Output

131K

tokens

Training Cutoff

Not published

Compatible SDK

OpenAI

Capabilities

Vision

Function Calling

Streaming

JSON Mode

System Prompt

Token Pricing (per 1M tokens)

Token Type	Credits	USD Equivalent
Input Tokens	3,716	$2.48
Output Tokens	11,148	$7.43
Cached Tokens	464.5	$0.31

* 1,500 credits ≈ $1 (actual charges may vary based on usage)

Quick Start

curl -X POST "https://api.core.today/llm/openrouter/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer cdt_your_api_key" \
  -d '{
  "model": "qwen/qwen3.8-max-0902",
  "messages": [
    {
      "role": "user",
      "content": "Summarize the attached report in 5 bullets."
    }
  ],
  "max_tokens": 1024
}'

Parameters

Parameter	Type	Required	Default	Description
`model`	string	Yes	-	Model ID in vendor/model form, e.g. "qwen/qwen3.8-max-0902".
`messages`	array	Yes	-	Chat messages in OpenAI format (system/user/assistant roles).
`temperature`	number	No	0.7	Sampling temperature (0-2).
`max_tokens`	integer	No	2048	Maximum completion tokens.
`stream`	boolean	No	false	Stream the response as server-sent events.

Examples

Chat completion

OpenAI-compatible chat completion request via OpenRouter

curl -X POST "https://api.core.today/llm/openrouter/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer cdt_your_api_key" \
  -d '{
  "model": "qwen/qwen3.8-max-0902",
  "messages": [
    {
      "role": "user",
      "content": "Summarize the attached report in 5 bullets."
    }
  ],
  "max_tokens": 1024
}'

Tips & Best Practices

1Works with the OpenAI SDK - set base_url to https://ai.api.core.today/llm/openrouter/v1

2Charged at OpenRouter's usage.cost x 1,858 credits/USD - the listed rates are estimates and may lag OpenRouter price changes

3Reasoning tokens count as output at the higher rate - set max_tokens generously for hard problems, and consider qwen/qwen3.8-27b for cheaper, lighter tasks