Aion Labs: Aion-2.0
aion-labs/aion-2.0
Access Aion-2.0 from Aion Labs using Puter.js AI API.
Get Started// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain quantum computing in simple terms", {
model: "aion-labs/aion-2.0"
}).then(response => {
document.body.innerHTML = response.message.content;
});
<html>
<body>
<script src="https://js.puter.com/v2/"></script>
<script>
puter.ai.chat("Explain quantum computing in simple terms", {
model: "aion-labs/aion-2.0"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
# pip install openai
from openai import OpenAI
client = OpenAI(
base_url="https://api.puter.com/puterai/openai/v1/",
api_key="YOUR_PUTER_AUTH_TOKEN",
)
response = client.chat.completions.create(
model="aion-labs/aion-2.0",
messages=[
{"role": "user", "content": "Explain quantum computing in simple terms"}
],
)
print(response.choices[0].message.content)
curl https://api.puter.com/puterai/openai/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_PUTER_AUTH_TOKEN" \
-d '{
"model": "aion-labs/aion-2.0",
"messages": [
{"role": "user", "content": "Explain quantum computing in simple terms"}
]
}'
Model Card
Aion 2.0 is a fine-tuned variant of DeepSeek V3.2, developed by AionLabs and optimized for immersive roleplaying and storytelling. It excels at generating narratives with natural tension, conflict, and dramatic stakes, and handles mature or darker themes with notable nuance.
The model offers a 131K-token context window with up to 32K tokens of output, making it well-suited for long-form creative sessions. It supports function calling and streaming. On third-party benchmarks, it has scored 99.5% on general knowledge, 96% on mathematics, and 93.5% on coding tasks.
Aion 2.0 is a strong pick for developers building interactive fiction, character-driven chat experiences, or creative writing tools where narrative depth and engagement matter more than raw speed.
Context Window 131K
tokens
Max Output 33K
tokens
Input Cost $0.8
per million tokens
Output Cost $1.6
per million tokens
Release Date Feb 24, 2026
Model Playground
Try Aion-2.0 instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
More AI Models From Aion Labs
Aion-1.0
Aion 1.0 is AionLabs' most powerful reasoning model, a multi-model system built on DeepSeek-R1 and augmented with Tree of Thoughts (ToT) and Mixture of Experts (MoE) techniques. It supports a 131K context window with up to 32K output tokens and includes vision capabilities. The model excels at reasoning and coding tasks, scoring 96.0% on coding, 99.5% on general knowledge, and achieving perfect accuracy on reasoning and email classification benchmarks (Benchable). It also ranks among the fastest models at its price point. Best suited for developers who need strong reasoning, coding assistance, and classification at competitive throughput.
ChatAion-1.0-Mini
Aion 1.0 Mini is a 32B-parameter reasoning model from AionLabs, distilled from DeepSeek-R1 and based on a modified FuseAI variant. It is designed for strong performance in mathematics, coding, and logic at a fraction of the cost of full-scale models. It delivers standout speed and pricing, consistently ranking among the fastest and most affordable options available. On Benchable, it scored 99.0% on email classification and 82.0% on reasoning tasks. This model is a good fit for developers who need fast, budget-friendly reasoning for structured tasks and can work around its instruction-following limitations.
ChatAion-RP 1.0 (8B)
Aion RP 1.0 8B is an uncensored roleplay and creative writing model from AionLabs, fine-tuned from the Llama 3.1 8B base model rather than an instruct variant. This base-model approach is designed to produce more natural and varied writing. It ranks highest in the character evaluation portion of RPBench-Auto, a roleplaying-specific benchmark derived from Arena-Hard-Auto where LLMs evaluate each other's responses. The model supports the full 131K context window and multi-turn conversations. Best suited for character-driven chat applications, interactive storytelling, and persona-consistent dialogue. A recommended temperature of 0.7 is advised, as higher values can degrade output quality.
Frequently Asked Questions
You can access Aion-2.0 by Aion Labs through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.
Yes, it is free if you're using it through Puter.js. With the User-Pays Model, you can add Aion-2.0 to your app at no cost — your users pay for their own AI usage directly, making it completely free for you as a developer.
| Price per 1M tokens | |
|---|---|
| Input | $0.8 |
| Output | $1.6 |
Aion-2.0 was created by Aion Labs and released on Feb 24, 2026.
Aion-2.0 supports a context window of 131K tokens. For reference, that is roughly equivalent to 262 pages of text.
Aion-2.0 can generate up to 33K tokens in a single response.
Yes — the Aion-2.0 API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.
Get started with Puter.js
Add Aion-2.0 to your app without worrying about API keys or setup.
Read the Docs View Tutorials