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OpenRouter

Qwen3.5 Plus 2026-04-20 API

OpenRouter
About

Build advanced reasoning agents with Qwen3.5 Plus 2026-04-20, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.30/1M input and $1.80/1M output tokens, native tool calling support. Access Qwen3.5 Plus 2026-04-20 via the OpenRouter API with up to 66K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
66K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.30
Output
$1.80

Caching (per 1M tokens)

Write
$0.38
Frequently Asked Questions

Qwen3.5 Plus 2026-04-20 by OpenRouter costs $0.30 per 1M input tokens and $1.80 per 1M output tokens. Cache writes cost $0.38 per 1M tokens.

Model Details
ID
qwen/qwen3.5-plus-20260420
Provider
OpenRouter
Family
qwen3.5
Release Date
Apr 27, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@openrouter/ai-sdk-provider
Environment Variables
OPENROUTER_API_KEY
API Base URL
https://openrouter.ai/api/v1
Documentation