Qwen 3.5 397B API
Alibaba
Qwen 3.5 397B — Alibaba flagship MoE reasoning model for complex reasoning, coding, and general knowledge tasks.
About Qwen 3.5 397B
Qwen 3.5 397B is a large language model developed by Alibaba. It's particularly well-suited for analyzing images, screenshots, and visual content, tackling complex, multi-step reasoning problems, orchestrating tool-using agents that call APIs and external services, producing structured outputs for reliable data extraction, and handling large contexts of up to 128K tokens. Its 128K-token context window means you can pass in entire documents, codebases, or conversation histories without losing context. Developers choose Qwen 3.5 397B when they need reliable, production-quality AI inference through a simple API — and on Qubax, it's available at a fraction of the cost of traditional providers.
In the broader AI landscape, Qwen 3.5 397B sits among the frontier-tier offerings from Alibaba With advanced reasoning and multimodal vision and agentic tool use, it competes with the most frontier-tier models on the market. What sets it apart on Qubax isn't just the model itself — it's the accessibility. Rather than dealing with enterprise contracts or traditional payment rails, you get instant access via an OpenAI-compatible endpoint. That means you can drop Qwen 3.5 397B into Cursor, Cline, LangChain, or any framework that speaks the OpenAI protocol and start building immediately.
Qubax offers Qwen 3.5 397B at 28% below OpenRouter's price — just $0.281 per million input tokens and $1.69 per million output tokens. That pricing advantage compounds quickly at scale: a high-volume application sending millions of tokens per day can save significantly compared to using OpenRouter or the provider directly. And because Qubax runs on crypto-native infrastructure, you can pay with USDC, USDT, ETH, BTC, or 200+ other cryptocurrencies — no credit card or bank account required.
Pricing
| Token Type | Qubax | OpenRouter | You Save |
|---|---|---|---|
| Input (per 1M tokens) | $0.281 | $0.390 | 28% |
| Output (per 1M tokens) | $1.69 | $2.34 | 28% |
| Cache read (per 1M tokens) | $0.169 | — | — |
Prices per 1 million tokens. Pay with 200+ cryptocurrencies. Cache read is the discounted rate providers offer for repeated prompt prefixes.
Price History (60 Days)
This model's price over the last 60 days. Compare against all top AI models →
Estimated Monthly Cost
Specifications
Use Cases
Capabilities
Quick Start
from openai import OpenAI
client = OpenAI(
base_url="https://api.qubax.ai/v1",
api_key="qbx_live_YOUR_API_KEY",
)
response = client.chat.completions.create(
model="qwen3.5-397b-a17b",
messages=[
{"role": "user", "content": "Hello!"}
],
)
print(response.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.qubax.ai/v1",
apiKey: "qbx_live_YOUR_API_KEY",
});
const response = await client.chat.completions.create({
model: "qwen3.5-397b-a17b",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);curl https://api.qubax.ai/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer qbx_live_YOUR_API_KEY" \
-d '{
"model": "qwen3.5-397b-a17b",
"messages": [{"role": "user", "content": "Hello!"}]
}'Get your API key from the dashboard.
Why use Qwen 3.5 397B on Qubax?
28% Cheaper
Up to 28% off OpenRouter prices
Pay with Crypto
200+ coins (BTC, ETH, SOL, USDT, USDC & more). No credit card needed.
OpenAI Compatible
Drop-in replacement. Works with Cline, Cursor, any tool.
More from Alibaba
Compare Qwen 3.5 397B with alternatives
| Model | Provider | Input / 1M | Output / 1M | vs Qwen 3.5 397B |
|---|---|---|---|---|
| Qwen 3.5 397B | Alibaba | $0.281 | $1.69 | — |
| Trinity Large Thinking (Morpheus Web) | Other | $0.352 | $1.27 | More expensive |
| Seed 2.1 Turbo | Other | $0.188 | $0.938 | Cheaper |
| Trinity Large Thinking | Other | $0.314 | $1.13 | More expensive |
| Claude Haiku 4.5 | Anthropic | $0.300 | $1.50 | More expensive |
Frequently Asked Questions
How much does the Qwen 3.5 397B API cost?
On Qubax, Qwen 3.5 397B costs $0.281 per 1M input tokens and $1.69 per 1M output tokens. This is 28% cheaper than OpenRouter's price of $0.390 per 1M input tokens.
Is the Qwen 3.5 397B API compatible with OpenAI?
Yes. Qubax provides an OpenAI-compatible API. You can use Qwen 3.5 397B as a drop-in replacement by changing your base URL to https://api.qubax.ai/v1 and using your Qubax API key. It works with Cline, Cursor, OpenCode, Hermes Agent, and any tool that supports OpenAI APIs.
Why is Qwen 3.5 397B cheaper on Qubax than OpenRouter?
Qubax sources AI inference from an open compute marketplace on the Base blockchain where GPU providers compete on price. We pass the savings to you — 28% cheaper than OpenRouter's price for Qwen 3.5 397B.
How do I pay for Qwen 3.5 397B API usage?
Qubax uses prepaid crypto credits. Deposit USDC on the Base chain and your balance is automatically deducted as you use the API. No credit card required. Top up from $3.
What is the context window of Qwen 3.5 397B?
Qwen 3.5 397B supports a context window of 128K tokens, allowing you to process large documents, codebases, or long conversations in a single request.
What can I build with Qwen 3.5 397B?
Qwen 3.5 397B is versatile enough for a wide range of applications. You can use it to analyze images and visual content, tackle complex multi-step reasoning tasks, build autonomous agents that call external tools and APIs, generate structured JSON output for data pipelines, process long documents and entire codebases, and more. Because it's served through Qubax's OpenAI-compatible API, integration into existing apps, agents, or workflows takes just a few lines of code.
How fast is Qwen 3.5 397B on Qubax?
Qwen 3.5 397B on Qubax supports streaming responses, so tokens begin arriving in real time as they're generated. Latency depends on the provider and prompt complexity, but most requests start streaming within 200–800 milliseconds. Qubax routes requests through an intelligent routing layer, which selects the fastest available compute provider for each request — so you get competitive latency at a lower price.
Qwen 3.5 397B vs Trinity Large Thinking (Morpheus Web): which should I choose?
Qwen 3.5 397B by Alibaba and Trinity Large Thinking (Morpheus Web) by Other are both strong models in a similar price tier. Qwen 3.5 397B excels at complex reasoning and supports vision/image inputs. Trinity Large Thinking (Morpheus Web) comes from a different lab and may have different strengths depending on your workload. On Qubax, Qwen 3.5 397B starts at $0.281/1M input tokens versus Trinity Large Thinking (Morpheus Web)'s $0.352/1M — making Qwen 3.5 397B the more cost-effective option for high-volume workloads. Both are available on Qubax with crypto payments and OpenAI-compatible APIs, so you can try each and switch freely.
Can I use Qwen 3.5 397B for commercial projects?
Yes. Qwen 3.5 397B on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.
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