LLM Perks

Qwen 3.5 397B

Alibaba Cloud · All Qwen models
Free right now Frontier
ReasoningCodingTool useLong contextOpen weights

Qwen 3.5 397B is a language model with 397B parameters from Alibaba Cloud. It is currently free at 1 provider with up to 262K tokens of context. The model supports step-by-step reasoning, is suited to coding, supports tool calling. Its weights are open, so it can also run locally.

Developer
Alibaba Cloud
Parameters
397B / 17B active
Context
262K tokens
Type
Text
License
Open weights
Free since
September 22, 2026

Where to use Qwen 3.5 397B for free

Each row is a separate free endpoint with its own limits.

ProviderContextLimitCard
UnoRouter
qwen3.5-397b-a17b:free
262K No-card free models use shared capacity and per-model limits; availability can change. No Open

Quick start

curl https://api.unorouter.com/v1/chat/completions \
  -H "Authorization: Bearer $UNOROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen3.5-397b-a17b:free",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Example for UnoRouter. Any OpenAI-compatible client works: Cursor, Cline, OpenCode, Open WebUI.

Benchmarks

Intelligence Index
21.4
GPQA Diamond
86.1%
Humanity's Last Exam
19.8%
Terminal-Bench Hard
35.6%
τ²-Bench
83.9%
Long context (LCR)
64.3%

Source: Artificial Analysis · Qwen3.5 397B A17B (Non-reasoning)

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FAQ

Is Qwen 3.5 397B free?

Yes. As of November 2, 2026, Qwen 3.5 397B is free at UnoRouter. Each provider has its own limits — see the table above.

What is the context window of Qwen 3.5 397B?

The largest context among free routes is 262,100 tokens. Some providers cap it lower.

How do I call Qwen 3.5 397B via API?

Use any OpenAI-compatible client with base URL https://api.unorouter.com/v1, model ID qwen3.5-397b-a17b:free, and a UnoRouter key.

How good is Qwen 3.5 397B?

Artificial Analysis Intelligence Index: 21.4, GPQA Diamond: 86%. For comparison, the strongest free model in the catalog right now is GLM 5.3 Flash.

Is Qwen 3.5 397B open-weight?

Yes, the weights are published — you can download and run it locally, for example with Ollama or LM Studio.