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Qwen3.5 Plus 2026-02-15

Qwen3.5 Plus 2026-02-15 from Qwen: a text model for chat and completions, with a 1M-token context window and up to 65,536 output tokens. Routed to the cheapest provider. At or below list. Pay per token in USDF, with no subscription and no minimum. Streaming and the OpenAI-compatible request format are supported.

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Qwenqwen3.5-plus-02-15AvailabletextContext window: 1,000,000 tokens

Input

$0.26

per 1M tokens

Output

$1.56

per 1M tokens

Context window

1,000,000

tokens

Prompts above 256,000 tokens bill the whole request at $0.325/M input and $1.95/M output.

Model ID: qwen3.5-plus-02-15
Modality: text
Unit: USD per 1M tokens
Endpoints: /v1/chat/completions
Max output: 65,536 tokens
Saving vs list: 4.76%

Data policy

Retains dataNo training

Make your first request

Use any OpenAI-compatible SDK. Change the base URL, keep everything else. Responses include a receipt with the exact cost. No key yet? Create one.

No account: send the same request to /x402/v1/chat/completions without credentials and the gateway answers 402 with the quote. Pay per request.

POST /v1/chat/completions

curl https://api.usdf.fi/v1/chat/completions \
  -H "Authorization: Bearer $USDF_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "qwen3.5-plus-02-15", "messages": [{"role": "user", "content": "Hello"}]}'