# Qwen3.5-Plus

> Alibaba's hosted, low-cost multimodal Plus model — 1M context, reads images and video, built for agents.

- Maker: Alibaba (Qwen)
- Line: Qwen-Plus (multimodal agent)
- Canonical page: https://ai-tldr.dev/models/qwen3-5-plus/
- Updated: 2026-06-18

## In short

Qwen3.5-Plus is the hosted, API-only Plus model in Alibaba's Qwen3.5 generation, launched on 16 February 2026 alongside the open-weight Qwen3.5 family. It sits below the flagship Qwen3-Max as the value tier: cheaper to run while keeping the generation's strongest capabilities. It has a 1M-token context window and costs $0.40 per million input tokens and $2.40 per million output tokens. You can use it through Alibaba Cloud Model Studio (Bailian) and OpenRouter.

## Facts

| Fact | Value | Source |
| --- | --- | --- |
| Context window | 1M (max output 65,536 tokens) | [1] |
| Input price | $0.40 / 1M tokens | [2] |
| Output price | $2.40 / 1M tokens | [2] |
| Licence | Proprietary · API only | [1] |
| Released | 16 February 2026 | [3] |
| Parameters | Undisclosed (serves the Qwen3.5 397B-A17B family — 397B total / 17B active) | [1] |

## Sources

1. [Model Studio — supported models & capabilities](https://www.alibabacloud.com/help/en/model-studio/models)
2. [Model Studio — model pricing](https://www.alibabacloud.com/help/en/model-studio/model-pricing)
3. [CNBC — Alibaba unveils Qwen3.5 as China's chatbot race shifts to AI agents](https://www.cnbc.com/2026/02/17/china-alibaba-qwen-ai-agent-latest-model.html)

## Overview

Qwen3.5-Plus is the hosted, API-only Plus model in Alibaba's Qwen3.5 generation, launched on 16 February 2026 alongside the open-weight Qwen3.5 family. It sits below the flagship Qwen3-Max as the value tier: cheaper to run while keeping the generation's strongest capabilities. Unlike the downloadable Qwen3.5 weights, Plus is proprietary — you reach it only through Alibaba Cloud Model Studio (Bailian) and resellers such as OpenRouter.

Qwen3.5-Plus is natively multimodal: it accepts text, images, and short video clips as input and returns text. Alibaba's documentation says its multimodal understanding meaningfully outperforms the earlier Qwen3-VL series, while its plain-text quality is comparable to Qwen3-Max. The model carries a 1-million-token context window and supports both a fast 'non-thinking' mode and a chain-of-thought 'thinking' mode you toggle per request.

Qwen3.5-Plus is positioned as an agent model: it is tuned for tool calling and multi-step workflows, and the Plus tier emphasises managed infrastructure and adaptive tool use over raw self-hosting. It was the starting point of the Qwen-Plus line that continued with Qwen3.6-Plus (April 2026) and the GUI-driving Qwen3.7-Plus (June 2026).

## Benchmarks

- AIME 2026 (math): 91.3% ([source](https://www.digitalapplied.com/blog/qwen-3-5-agentic-ai-benchmarks-guide))
- GPQA Diamond: 88.4% ([source](https://www.digitalapplied.com/blog/qwen-3-5-agentic-ai-benchmarks-guide))
- MMLU-Pro: 87.8% ([source](https://www.digitalapplied.com/blog/qwen-3-5-agentic-ai-benchmarks-guide))
- MMMU (multimodal): 85% ([source](https://www.digitalapplied.com/blog/qwen-3-5-agentic-ai-benchmarks-guide))
- LiveCodeBench v6: 83.6% ([source](https://www.digitalapplied.com/blog/qwen-3-5-agentic-ai-benchmarks-guide))
- SWE-bench Verified: 76.4% ([source](https://www.digitalapplied.com/blog/qwen-3-5-agentic-ai-benchmarks-guide))

## Pricing

- Input: $0.40 / 1M tokens
- Output: $2.40 / 1M tokens

International (Model Studio) rate for the 0–256K input tier; input rises to $0.50/1M above 256K. Includes 1M free tokens for 90 days after activation.

Source: https://www.alibabacloud.com/help/en/model-studio/model-pricing

## Strengths

- 1-million-token context window for long documents, codebases, and multi-turn agent traces
- Native multimodal input — text, images, and short video clips — at a low price point
- Toggleable thinking / non-thinking modes, so you pay for reasoning only when a task needs it
- Tuned for agentic tool calling and multi-step workflows
- Inexpensive: $0.40 per 1M input tokens and $2.40 per 1M output tokens on Model Studio

## Best for

- High-volume document and PDF understanding across very long contexts
- Multimodal apps that need to read screenshots, charts, or short video clips
- Tool-using agents and assistants where cost-per-call matters
- Coding and productivity workflows that benefit from a large context but a modest budget
- Drop-in OpenAI-compatible API usage via Model Studio or OpenRouter

## How to access

- [Alibaba Cloud Model Studio (Bailian)](https://www.alibabacloud.com/help/en/model-studio/models) — model id `qwen3.5-plus`
- [OpenRouter](https://openrouter.ai/qwen) — model id `qwen/qwen3.5-plus`

## Qwen-Plus (multimodal agent) versions

- [Qwen3.7-Plus](https://ai-tldr.dev/models/qwen3-7-plus/) (2 June 2026)
- [Qwen3.6-Plus](https://ai-tldr.dev/models/qwen3-6-plus/) (April 2026)
- Qwen3.5-Plus (16 February 2026) — this page

## FAQ

### Is Qwen3.5-Plus open-source?

No. Qwen3.5-Plus is a proprietary, API-only model. The open-weight Qwen3.5 family (released the same day under Apache 2.0) is downloadable, but the Plus tier is served only through Alibaba Cloud Model Studio and resellers like OpenRouter.

### What can Qwen3.5-Plus see — images and video?

Yes. Qwen3.5-Plus is natively multimodal and accepts text, images, and short video clips as input, returning text. Alibaba states its multimodal understanding outperforms the earlier Qwen3-VL series.

### How large is the context window?

Qwen3.5-Plus supports a 1-million-token context window, with a maximum output of 65,536 tokens per response, according to Alibaba Cloud Model Studio documentation.

### How much does Qwen3.5-Plus cost?

On Alibaba Cloud Model Studio (International), Qwen3.5-Plus is $0.40 per 1M input tokens and $2.40 per 1M output tokens for the 0–256K input tier; input rises to $0.50/1M above 256K. New accounts get 1M free tokens for 90 days.

## Links

- [Alibaba (Qwen) — official site](https://qwen.ai)
- [Model Studio — supported models & capabilities](https://www.alibabacloud.com/help/en/model-studio/models)
- [Model Studio — model pricing](https://www.alibabacloud.com/help/en/model-studio/model-pricing)
- [OpenRouter — Qwen models](https://openrouter.ai/qwen)
- [CNBC — Alibaba unveils Qwen3.5 as China's chatbot race shifts to AI agents](https://www.cnbc.com/2026/02/17/china-alibaba-qwen-ai-agent-latest-model.html)
- [Qwen 3.5 — benchmarks & guide (Digital Applied)](https://www.digitalapplied.com/blog/qwen-3-5-agentic-ai-benchmarks-guide)

Source: AI/TLDR LLM registry, https://ai-tldr.dev/models/qwen3-5-plus/