Qwen 3.8 Max Prime

alibaba/qwen3.8-max-prime

A chat model with a 1M-token context window, at $4.20 per million input tokens and $12.60 per million output tokens.

Details

Maker: alibaba
Kind: Chat
Context window: 1,000,000 tokens
Max output: 131,072 tokens
Input: $4.20 per million tokens
Cached input: $0.525 per million tokens, 88% off
Cache write: $5.25 per million tokens
Output: $12.60 per million tokens
Capabilities: Reasoning, tool use, vision
Takes: Text, image
Returns: Text
Zero data retention: Yes, on every provider
No training on requests: Yes, on every provider
Released: 2026-09-23

Description

Qwen 3.8 Max Prime is the high-speed edition of Qwen 3.8 Max, retaining its 2.4-trillion-parameter MoE architecture and full capabilities while delivering 1.5–2× higher output throughput. Built for coding, office automation, and long-running agent workflows, it supports autonomous multi-day development, professional knowledge work, and visual understanding with a 1M-token context window.

Call it

curl

curl https://phantom.codes/v1/chat/completions \
  -H "Authorization: Bearer $PHANTOM_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "alibaba/qwen3.8-max-prime",
    "messages": [
      {"role": "user", "content": "Hello"}
    ]
  }'

Set PHANTOM_KEY to your key. Any OpenAI client works with the base URL https://phantom.codes/v1.

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