Qwen3.5 Plus API
About
Build advanced reasoning agents with Qwen3.5 Plus, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support. Access Qwen3.5 Plus via the Alibaba Coding Plan API with up to 66K output tokens.
Capabilities
Input Modalities
textimagevideo
Output Modalities
text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
66K
Tokens
Pricing
Standard (per 1M tokens)
Input
Free
Output
Free
Caching (per 1M tokens)
Read
Free
Write
Free
Frequently Asked Questions
Qwen3.5 Plus by Alibaba Coding Plan costs Free per 1M input tokens and Free per 1M output tokens. Cached reads cost Free per 1M tokens. Cache writes cost Free per 1M tokens.
Model Details
ID
qwen3.5-plus
Provider
Alibaba Coding PlanFamily
qwen
Release Date
Feb 16, 2026
Knowledge Cutoff
Apr 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
ALIBABA_CODING_PLAN_API_KEY
API Base URL
https://coding-intl.dashscope.aliyuncs.com/v1