What is the context window of AionLabs: Aion 3.5?

AionLabs: Aion 3.5 supports a context window of 262K tokens.

Is AionLabs: Aion 3.5 free to use?

AionLabs: Aion 3.5 is a paid model. It costs $3.00 per million input tokens and $6.00 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.

AionLabs: Aion 3.5 API Pricing — $3.00 Input / $6.00 Output per 1M Tokens

Q: How much does AionLabs: Aion 3.5 cost?

AionLabs: Aion 3.5 costs $3.00 per million input tokens and $6.00 per million output tokens via OpenRouter. Pricing was last updated Oct 29, 2026.

AionLabs: Aion 3.5 by Aion Labs — $3.00 input / $6.00 output per 1M tokens via OpenRouter. Context: 262K tokens. Pricing last updated Oct 29, 2026.

Input / 1M tokens

$3.00

Output / 1M tokens

$6.00

Provider

Aion Labs

Context window

262K tokens

Via

OpenRouter

Cost at common usage volumes

Usage	Daily	Monthly
Chatbot (100/day)	$0.900	$27.00
Small app (1K/day)	$6.00	$180.00
Mid-scale (10K/day)	$90.00	$2700.00
Large scale (100K/day)	$2100.00	$63000.00

Model ID: aion-labs/aion-3.5
Data source: OpenRouter public API — updated Oct 29, 2026.

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About AionLabs: Aion 3.5

AionLabs: Aion 3.5 is an LLM developed by Aion Labs. Input costs $3.00 per million tokens and output costs $6.00 per million tokens via OpenRouter. It supports a context window of 262K tokens.

Pricing Details

Via the OpenRouter API:

Input tokens: $3.00 per 1 million tokens
Output tokens: $6.00 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 AionLabs: Aion 3.5 Cost?

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

Daily cost: $6.0000
Monthly cost: $180.000

Accessing AionLabs: Aion 3.5 via OpenRouter

OpenRouter provides a unified API for 200+ LLMs including AionLabs: Aion 3.5. 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 aion-labs/aion-3.5.

Compare AionLabs: Aion 3.5 with Other Models

Use the AI Model Cost Comparison tool to compare AionLabs: Aion 3.5 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. AionLabs: Aion 3.5 is available on OpenRouter with the model ID aion-labs/aion-3.5. OpenRouter provides a unified API compatible with OpenAI's SDK format.