Qwen 3.5 Flash

alibaba/qwen3.5-flash

A chat model with a 1M-token context window, at $0.105 per million input tokens and $0.42 per million output tokens.

Details

Maker: alibaba
Kind: Chat
Context window: 1,000,000 tokens
Max output: 64,000 tokens
Input: $0.105 per million tokens
Cached input: $0.0105 per million tokens, 90% off
Cache write: $0.13125 per million tokens
Output: $0.42 per million tokens
Capabilities: Reasoning, tool use, vision, file input
Takes: Text, image, pdf
Returns: Text
Zero data retention: Yes, on every provider
No training on requests: Yes, on every provider
Released: 2026-02-24

Description

The Qwen3.5 native vision-language Flash models are built on a hybrid architecture that integrates a linear attention mechanism with a sparse mixture-of-experts model, achieving higher inference efficiency. Compared to the 3 series, these models deliver a leap forward in performance for both pure text and multimodal tasks, offering fast response times while balancing inference speed and overall performance.

Call it

curl

curl https://phantom.codes/v1/chat/completions \
  -H "Authorization: Bearer $PHANTOM_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "alibaba/qwen3.5-flash",
    "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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