aion-2-0
Aion-2.0 is a DeepSeek V3.2 variant optimized for immersive roleplaying and storytelling, especially good at introducing tension, crises and conflict that make narratives more engaging.
Precio: Entrada: 192 créditos / 1 M de tokens (≈ $0.96); salida: 384 créditos / 1 M de tokens (≈ $1.92).
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Aion-2.0 API on ModelFold
Aion-2.0 is a DeepSeek V3.2 variant optimized for immersive roleplaying and storytelling, especially good at introducing tension, crises and conflict that make narratives more engaging. Try Aion-2.0 in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.
What Is the Aion-2.0 API
Aion-2.0 at a glance
Aion-2.0 is a chat model from AionLabs. It accepts text as input and returns text, with a context window of up to 131K tokens.
Use it without hosting anything
On ModelFold you call Aion-2.0 with a single API key — no model weights to download and no inference servers to run. The same key also works for the other chat, image, video and audio models on ModelFold.
Core Capabilities of Aion-2.0
Up to 131K tokens of context
Keep long conversations, large documents and sizeable code in a single request, so the model can reason over the full material instead of fragments.
Function calling
Aion-2.0 supports tool (function) calling: describe your functions in the request and the model returns structured calls your code can run — the basis for agents and integrations.
Reasoning mode
Aion-2.0 can produce reasoning before its final answer; in the Playground you can switch reasoning on or off to compare results.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
How to Use Aion-2.0 on ModelFold
- 1
Step 1: Try it in the Playground
Open the Playground at the top of this page, type a prompt and see how Aion-2.0 responds before writing any code.
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Step 2: Create an API key
Sign in to ModelFold and create an API key in the console. Keep it secret and send it as a Bearer token.
- 3
Step 3: Send a request
Call POST https://modelfold.ai/v1/chat/completions with "model": "aion-2-0" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.
- ✓
Step 4: Ship and monitor
Integrate the response into your product and check token usage and spend for every call in the console logs.
What You Can Build with Aion-2.0
Writing and content
Draft, edit and translate articles, emails, product copy and documentation in a consistent tone.
Analysis and complex reasoning
Work through research questions, data interpretation, planning and other problems that need careful step-by-step reasoning.
Frequently Asked Questions
What is Aion-2.0?⌄
Aion-2.0 is a DeepSeek V3.2 variant optimized for immersive roleplaying and storytelling, especially good at introducing tension, crises and conflict that make narratives more engaging.
Which inputs does Aion-2.0 support?⌄
Aion-2.0 accepts text and returns text. Through ModelFold you send text messages; documents attached in the Playground are converted to text.
How long is the context window of Aion-2.0?⌄
Up to 131K tokens, shared between your input and the model’s output.
Does Aion-2.0 support function calling?⌄
Yes. Aion-2.0 supports tools / function calling through the standard tools parameter of the chat completions API.
How is Aion-2.0 billed on ModelFold?⌄
Pay as you go by tokens: input and output tokens are charged at the per-million-token prices shown on this page. There is no monthly fee, and failed requests are not charged.
How do I call Aion-2.0 through the API?⌄
Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "aion-2-0", using your ModelFold API key as the Bearer token.
| Entrada | 192 créditos 1M tokens≈ $0.96 |
| Salida | 384 créditos 1M tokens≈ $1.92 |
Se cobra por token, con tarifas separadas para entrada y salida. Los tokens de razonamiento cuentan como salida. El entorno de pruebas aplica exactamente el mismo cálculo.
Leer la documentación de la API →AI Agents · Claude Code / Cursor / Trae →curl https://modelfold.ai/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"aion-2-0","messages":[{"role":"user","content":"Hello"}]}'