Aion-1.0
VerifiedAion-1.0 manages long text sequences with a 131k-token context window.
About Aion-1.0
Aion-1.0 is a proprietary LLM released by Aion-labs. Its design centers on text modality with a fixed context capacity of 131072 tokens. Weights remain unavailable for download or local inspection.
The large context window allows the model to process lengthy documents or multi-turn dialogues in a single pass. Because it is closed-weight, access occurs exclusively through hosted endpoints. Typical usage includes summarization, analysis, and generation tasks that benefit from broad textual context.
Capabilities
How Aion-1.0 compares
Aion-1.0 (striped bar) vs other language models on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · Aion-1.0 ranks #95 of 98
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Long Document Summarization
Aion-1.0 processes entire books, research papers, or legal filings in a single pass thanks to its 131072-token context window.
Repository-scale Code Analysis
The model ingests full codebases to identify bugs, suggest refactors, and generate documentation across multiple files.
Multi-session Conversation Continuity
Aion-1.0 retains context over thousands of turns, supporting ongoing projects such as iterative writing or complex technical troubleshooting.
Strengths & limitations
Strengths
- +Very large context window for lengthy text inputs
- +Focused text-only processing
- +Suitable for sustained, coherent language tasks
Limitations
- –No vision or multimodal support
- –Text modality only
- –High context length may increase compute demands
Cost calculator
Estimate what Aion-1.0 would cost for your usage.
Based on Aion-1.0's $4.00/1M input · $8.00/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "aion-labs/aion-1.0",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: aion-labs/aion-1.0
Editor's verdict
Aion-1.0 is Aion-labs's proprietary language models with a 131K-token context window.
At $8.00 per 1M output tokens, it is premium-priced for its class.
It is available through Aion-labs's API and aggregators like OpenRouter.
Best suited to very large context window for lengthy text inputs and focused text-only processing.
Frequently asked questions
Aion-1.0 supports a context window of 131072 tokens.
User reviews
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