# Aion-2.0

> Aion-2.0 is a language model from Aion Labs, released on 23 Feb 2026. It accepts text and generates text, with a 131K-token context window and up to 33K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.80 per million input tokens and $1.60 per million output tokens (OpenRouter), across 1 provider we track.

Source page: https://www.aimodel.directory/models/aion-2-0
Last verified: 4 Oct 2026

## Specifications

- **Developer:** Aion Labs
- **Release date:** 23 Feb 2026 (source: OpenRouter, https://openrouter.ai/aion-labs/aion-2.0)
- **Status:** Generally available
- **Context window:** 131K (131,072 tokens) (source: OpenRouter, https://openrouter.ai/aion-labs/aion-2.0)
- **Max output:** 33K tokens (source: OpenRouter, https://openrouter.ai/aion-labs/aion-2.0)
- **Input:** Text (source: OpenRouter, https://openrouter.ai/aion-labs/aion-2.0)
- **Output:** Text (source: OpenRouter, https://openrouter.ai/aion-labs/aion-2.0)
- **Reasoning mode:** Yes (source: OpenRouter, https://openrouter.ai/aion-labs/aion-2.0)
- **Tool calling:** Yes (source: OpenRouter, https://openrouter.ai/aion-labs/aion-2.0)
- **Structured output:** No (source: OpenRouter, https://openrouter.ai/aion-labs/aion-2.0)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| OpenRouter | $0.80 | $1.60 | $0.20 | 131K |

## FAQ

### What is the context window of Aion-2.0?

Aion-2.0 has a context window of 131,072 tokens (131K) and can generate up to 32,768 tokens in a single response, according to OpenRouter.

### How much does the Aion-2.0 API cost?

Aion-2.0 is listed from $0.80 per million input tokens and $1.60 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.

### When was Aion-2.0 released?

Aion Labs released Aion-2.0 on 23 Feb 2026, according to OpenRouter.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "Aion-2.0", https://www.aimodel.directory/models/aion-2-0