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Qwen/Qwen3.5-397B-A17B

Qwen3.5-397B-A17B is Alibaba's most capable Qwen3.5 model, a Mixture-of-Experts architecture with 397B total parameters and 17B activated per token. It features a 262K token context window (extensible to 1M with YaRN), thinking/reasoning mode, tool calling with MCP integration, and support for 201 languages. Sets state-of-the-art results on reasoning, coding, math, and multimodal benchmarks.

👁Vision🧠Reasoning🔧Tool calling⚡Caching
Try Qwen/Qwen3.5-397B-A17BCompareDocs

Specifications

Context window262K tokens
Max output—
API typechat
AddedMay 27, 2026
Model IDdeepinfra/Qwen/Qwen3.5-397B-A17B
Data retentionNo
Used for trainingNo
Provider location🇺🇸 US
Privacy policyDeepInfra Privacy Policy→

Benchmarks

Benchmarks haven't been published yet for this exact variant.

Some variants (region-specific deployments, highspeed tiers) share benchmarks with their base model — check the base model page or the DeepInfra Inc. models overview.

Pricing

Input / 1M
$0.49
Output / 1M
$3.60
Cache write
—
Cache read / 1M
$0.30
Estimated cost
100K input + 10K output$0.0850
1M input + 100K output$0.85
10M input + 1M output$8.50

Requesty charges exactly what the upstream provider charges — no markup, no per-request fees. Prompt caching and smart routing can reduce effective cost by 30-80%.

Quickstart

Drop-in compatible with the OpenAI SDK. Change the base URL, swap in your Requesty API key, and set the model to deepinfra/Qwen/Qwen3.5-397B-A17B.

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from openai import OpenAI

client = OpenAI(
    api_key="YOUR_REQUESTY_API_KEY",
    base_url="https://router.requesty.ai/v1",
)

response = client.chat.completions.create(
    model="deepinfra/Qwen/Qwen3.5-397B-A17B",
    messages=[
        {"role": "user", "content": "Explain quantum computing in one paragraph."},
    ],
)

print(response.choices[0].message.content)

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nvidia/NVIDIA-Nemotron-3-Super-120B-A12B
262K ctx$0.10/1M
moonshotai/Kimi-K2.6
262K ctx$0.75/1M
gemma-4-31B-it
262K ctx$0.13/1M
deepseek-ai/DeepSeek-V4-Pro
1.0M ctx$1.30/1M

Frequently asked questions

How much does Qwen/Qwen3.5-397B-A17B cost?
Qwen/Qwen3.5-397B-A17B is priced at $0.49 per million input tokens and $3.60 per million output tokens when accessed via Requesty. Prompt caching is supported, which can cut effective input cost by up to 90% on repeated context. Requesty charges exactly what the upstream provider charges — we don't add markup.
What is the context window of Qwen/Qwen3.5-397B-A17B?
Qwen/Qwen3.5-397B-A17B has a context window of 262K tokens. That's roughly 350 words of input you can fit in a single prompt.
What can Qwen/Qwen3.5-397B-A17B do?
Qwen/Qwen3.5-397B-A17B supports vision input, tool calling, extended reasoning, prompt caching. You can call it through any OpenAI-compatible client by pointing base_url to Requesty.
How do I use Qwen/Qwen3.5-397B-A17B with the OpenAI SDK?
Install the OpenAI SDK, set base_url to "https://router.requesty.ai/v1", set your API key to your Requesty key, and set the model to "deepinfra/Qwen/Qwen3.5-397B-A17B". The Quickstart above shows Python, JavaScript and cURL snippets.

Access Qwen/Qwen3.5-397B-A17B through Requesty

One API key, 400+ models, OpenAI-compatible. No markup on provider prices, automatic failover, and smart caching built-in.

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