Qwen 3.5 397B

by Alibaba

Released 13 days after Qwen 3 Coder Next · All Alibaba releases

Qwen3.5 397B A17B is Alibaba's large sparse Mixture-of-Experts model with 397 billion total parameters and 17 billion activated per token, built for frontier-class reasoning and coding. It is multimodal across text, image, and video, with a 262,144 token native context window extensible toward roughly one million tokens with YaRN scaling. Reported scores include MMLU-Pro 87.8, MMMU-Pro 79.0, and SWE-bench Verified 76.4. The model runs in thinking mode by default, generating reasoning tokens before its response, and supports recommended output lengths up to 81,920 tokens for hard problems. It targets demanding agentic workflows, repository-level code reasoning, structured outputs, and tool calling across more than 200 languages.

Key info

Input
Output
Features
Context window
262K
Max output
262K
Input price
$0.45 /1M
Output price
$3.00 /1M
Released
  • US residency available
  • Zero data retention on pay-as-you-go
  • No training by default
  • GDPR DPA available

Available routes

Qwen 3.5 397B runs on 5 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance — full data-handling detail per route below.

ProviderRegionZero data retentionTrainingInputOutput
USZero data retentionNo$0.45$3.00
USNot by defaultNo$0.55$3.50
USNot by defaultNo$0.50$3.50
USNot by defaultNo$0.60$3.60
USZero data retentionNo$0.60$3.60

Uptime and availability

Qwen 3.5 397B runs on 3 independently monitored routes through the Opper gateway. A direct integration leaves you on one of them, the gateway serves whichever is healthy.

100%effective uptime, last 30 days
Averaged across these routes on their own, a single provider reached 98.78% over the same window.
Daily status through the gateway, which serves each request from whichever route is healthy.
3 monitored providers serve Qwen 3.5 397B.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. 2 further routes for this model are not on the board yet and are not counted above. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting Qwen 3.5 397B has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

DeepInfra United States🇺🇸

Zero data retention is on by default on Pay-as-you-go — no action required. No training on customer data. US; unknown; DPA available.

Zero data retention
On by default on Pay-as-you-go. Derived from the logging and moderation facts.
Training
No training on customer data.
Logging
None
Moderation
Not established
Caching
Not established
Subprocessor access
Not established
GDPR DPA
DPA available
Transfer mechanism
unknown

DigitalOcean United States🇺🇸

Zero data retention is not on by default — a moderation hold applies. No training on customer data. US; dpf sccs; DPA available.

Zero data retention
Not by default — a moderation hold applies. Derived from the logging and moderation facts.
Training
No training on customer data.
Logging
None
Moderation
Holds content for review
Caching
Content cached for replay
Subprocessor access
No subprocessor reads content
GDPR DPA
DPA available
Transfer mechanism
dpf sccs

Morph United States🇺🇸

Zero data retention is not on by default — abuse monitoring, 30-day retention. No training on customer data. US; SCCs; DPA available.

Zero data retention
Not by default — abuse monitoring, 30-day retention. Derived from the logging and moderation facts.
Training
No training on customer data.
Logging
Abuse monitoring (30-day retention)
Moderation
Not established
Caching
Not established
Subprocessor access
Not established
GDPR DPA
DPA available
Transfer mechanism
SCCs

Nebius United States🇺🇸

Zero data retention is not on by default — abuse monitoring. No training on customer data. US; SCCs; DPA available.

Zero data retention
Not by default — abuse monitoring. Derived from the logging and moderation facts.
Training
No training on customer data.
Logging
Abuse monitoring
Moderation
Not established
Caching
Not established
Subprocessor access
Not established
GDPR DPA
DPA available
Transfer mechanism
SCCs

Novita United States🇺🇸

Zero data retention is on by default on Pay-as-you-go — no action required. No training on customer data. US; SCCs; DPA available.

Zero data retention
On by default on Pay-as-you-go. Derived from the logging and moderation facts.
Training
No training on customer data.
Logging
None
Moderation
Not established
Caching
Not established
Subprocessor access
Not established
GDPR DPA
DPA available
Transfer mechanism
SCCs

Benchmarks

Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.

Global rank#163 of 630 LLMs
TierEfficient
Output speed89 tok/s
First token1.57s
Intelligence Index26.1
Coding Index48.2
Reasoning & knowledge
GPQA Diamond
89%
Humanity's Last Exam
29%
Long-context reasoning
77%
Agentic & tool use
Terminal-Bench Hard
41%
τ²-Bench Telecom
96%
Math & instruction following
IFBench
79%

Get started

Call Qwen 3.5 397B through the Opper gateway with one API key. Let your coding agent set it up, or call it directly — Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPPER_API_KEY,
baseURL: "https://api.opper.ai/v3/compat",
});
const completion = await client.chat.completions.create({
model: "deepinfra/Qwen/Qwen3.5-397B-A17B",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

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