Qwen: Qwen3.5 Plus 2026-02-15

qwen/qwen3.5-plus-02-15

Created Feb 16, 20261,000,000 context

Starting at $0.40/M input tokensStarting at $2.40/M output tokens

The Qwen3.5 native vision-language series Plus models are built on a hybrid architecture that integrates linear attention mechanisms with sparse mixture-of-experts models, achieving higher inference efficiency. In a variety of task evaluations, the 3.5 series consistently demonstrates performance on par with state-of-the-art leading models. Compared to the 3 series, these models show a leap forward in both pure-text and multimodal capabilities.

Providers for Qwen3.5 Plus 2026-02-15

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for Qwen3.5 Plus 2026-02-15

Compare different providers across OpenRouter

Apps using Qwen3.5 Plus 2026-02-15

Top public apps this month

Recent activity on Qwen3.5 Plus 2026-02-15

Total usage per day on OpenRouter

Prompt

574M

Completion

56M

Reasoning

34.1M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for Qwen3.5 Plus 2026-02-15

Uptime stats for Qwen3.5 Plus 2026-02-15 across all providers

Sample code and API for Qwen3.5 Plus 2026-02-15

OpenRouter normalizes requests and responses across providers for you.

OpenRouter supports reasoning-enabled models that can show their step-by-step thinking process. Use the reasoning parameter in your request to enable reasoning, and access the reasoning_details array in the response to see the model's internal reasoning before the final answer. When continuing a conversation, preserve the complete reasoning_details when passing messages back to the model so it can continue reasoning from where it left off. Learn more about reasoning tokens.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.