How much does AionLabs: Aion 3.5 cost per 1M tokens?

AionLabs: Aion 3.5 costs $3.00 per 1M input tokens and $6.00 per 1M output tokens on the standard tier. Cached input is $0.750 per 1M.

What is AionLabs: Aion 3.5's context window?

AionLabs: Aion 3.5 accepts up to 262,144 tokens in a single request, and can return up to 32,768 output tokens.

Is there a cheaper OpenRouter model than AionLabs: Aion 3.5?

Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $3.00 for AionLabs: Aion 3.5, with a 16,385 token context window.

Where does this AionLabs: Aion 3.5 price come from?

From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

AionLabs: Aion 3.5 pricing

Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models. AionLabs: Aion 3.5 from OpenRouter costs $3.00 per 1M input tokens and $6.00 per 1M output tokens. Cached input is $0.750 per 1M. Context window 262,144 tokens.

API id aion-labs/aion-3.5 · OpenRouter · source · updated 2026-09-25 · general-purpose

$3.00

Input / 1M tokens

$6.00

Output / 1M tokens

$0.750

Cached input / 1M

262K

Context window

AionLabs: Aion 3.5 specifications

Provider: OpenRouter
API id: aion-labs/aion-3.5
Model type: general-purpose
Context window: 262K tokens
Max output: 33K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-09-25

What AionLabs: Aion 3.5 costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.0060
Document summary	50,000	2,000	$0.16
1M tokens in, 200K out	1,000,000	200,000	$4.20

Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.

Common questions

How much does AionLabs: Aion 3.5 cost per 1M tokens?: AionLabs: Aion 3.5 costs $3.00 per 1M input tokens and $6.00 per 1M output tokens on the standard tier. Cached input is $0.750 per 1M.
What is AionLabs: Aion 3.5's context window?: AionLabs: Aion 3.5 accepts up to 262,144 tokens in a single request, and can return up to 32,768 output tokens.
Is there a cheaper OpenRouter model than AionLabs: Aion 3.5?: Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $3.00 for AionLabs: Aion 3.5, with a 16,385 token context window.
Where does this AionLabs: Aion 3.5 price come from?: From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

Head-to-head comparisons

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