What is the context window of Qwen: Qwen3.5 Plus 2026-04-20?

Qwen: Qwen3.5 Plus 2026-04-20 supports a context window of 1.0M tokens.

Is Qwen: Qwen3.5 Plus 2026-04-20 free to use?

Qwen: Qwen3.5 Plus 2026-04-20 is a paid model. It costs $0.300 per million input tokens and $1.80 per million output tokens.

How is LLM API pricing calculated?

LLM pricing has two components: input tokens (everything you send) and output tokens (what the model generates). Total cost = (prompt tokens × input rate + output tokens × output rate) / 1,000,000 × number of requests.

Qwen: Qwen3.5 Plus 2026-04-20 API Pricing — $0.300 Input / $1.80 Output per 1M Tokens

Q: How much does Qwen: Qwen3.5 Plus 2026-04-20 cost?

Qwen: Qwen3.5 Plus 2026-04-20 costs $0.300 per million input tokens and $1.80 per million output tokens via OpenRouter. Pricing was last updated Oct 29, 2026.

Qwen: Qwen3.5 Plus 2026-04-20 by Qwen / Alibaba — $0.300 input / $1.80 output per 1M tokens via OpenRouter. Context: 1.0M tokens. Pricing last updated Oct 29, 2026.

Input / 1M tokens

$0.300

Output / 1M tokens

$1.80

Provider

Qwen / Alibaba

Context window

1.0M tokens

Via

OpenRouter

Cost at common usage volumes

Usage	Daily	Monthly
Chatbot (100/day)	$0.240	$7.20
Small app (1K/day)	$1.20	$36.00
Mid-scale (10K/day)	$15.00	$450.00
Large scale (100K/day)	$330.00	$9900.00

Model ID: qwen/qwen3.5-plus-20260420
Data source: OpenRouter public API — updated Oct 29, 2026.

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About Qwen: Qwen3.5 Plus 2026-04-20

Qwen: Qwen3.5 Plus 2026-04-20 is an LLM developed by Qwen / Alibaba. Input costs $0.300 per million tokens and output costs $1.80 per million tokens via OpenRouter. It supports a context window of 1.0M tokens.

Pricing Details

Via the OpenRouter API:

Input tokens: $0.300 per 1 million tokens
Output tokens: $1.80 per 1 million tokens

A token is roughly 0.75 words. For context: a typical user message of 100 words is approximately 133 tokens; a 500-word system prompt is about 650 tokens.

How Much Does Qwen: Qwen3.5 Plus 2026-04-20 Cost?

For a typical chatbot application (1,000 requests/day, 1,000 prompt tokens and 500 output tokens per request):

Daily cost: $1.2000
Monthly cost: $36.000

Accessing Qwen: Qwen3.5 Plus 2026-04-20 via OpenRouter

OpenRouter provides a unified API for 200+ LLMs including Qwen: Qwen3.5 Plus 2026-04-20. You can use it with any OpenAI-compatible SDK by setting the base URL to https://openrouter.ai/api/v1 and using your OpenRouter API key. The model ID is qwen/qwen3.5-plus-20260420.

Compare Qwen: Qwen3.5 Plus 2026-04-20 with Other Models

Use the AI Model Cost Comparison tool to compare Qwen: Qwen3.5 Plus 2026-04-20 against GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, or any other model side by side. Or use the LLM API Cost Calculator to browse all 456+ models sorted by cost for your specific usage.

Frequently Asked Questions

Yes. Qwen: Qwen3.5 Plus 2026-04-20 is available on OpenRouter with the model ID qwen/qwen3.5-plus-20260420. OpenRouter provides a unified API compatible with OpenAI's SDK format.