Aion 2.0
AionLabs' affordable text-only model featuring reasoning, web search, and a 128K context window.
Get API key- Provider
- AionLabs
- Price
- $1 in · $2 out / 1M
- Context window
- 128K tokens
- Released
- February 23, 2026
- License
- Proprietary
What is Aion 2.0?
Aion 2.0 is a text-only large language model developed by AionLabs and released in February 2026. It features a 128K token context window and supports reasoning and web search. Positioned as an economical option, it is best suited for lighter, general-purpose text workflows.
Use it privately on Venice
On Venice, you can access Aion 2.0 under our anonymized privacy tier, ensuring your requests are forwarded without identifying personal information. Please note that Aion 2.0 is hosted by a third-party provider rather than Venice's own zero-retention infrastructure, meaning the provider may retain prompt data according to their own policies. Venice strip-searches your metadata to maximize your sovereignty, but we recommend open-source models on our platform if you require absolute zero-retention guarantees.
What can it do?
- •Highly competitive pricing at $1 per million input and $2 per million output tokens.
- •Native support for reasoning and web search capabilities to ground responses in real-time data.
- •An exceptionally large maximum output limit of 32.768K tokens for long-form document generation.
- •No published benchmark data across reasoning, coding, or agentic tasks, making its performance unverified.
- •Strictly text-only modality with no support for vision, image generation, or multimodal workflows.
- •Closed-weights model that cannot be self-hosted or customized for sovereign deployments.
Aion 2.0 capabilities
- Tool use / function calling
- Vision (image input)
- Reasoning
- Web search
- Code-optimized
- Structured output (JSON schema)
- Audio input
- Video input
- Multiple image inputs
- Log probabilities
How to use it via API
Venice exposes an OpenAI-compatible API. Swap your base URL and call aion-labs-aion-2-0.
curl https://api.venice.ai/api/v1/chat/completions \
-H "Authorization: Bearer $VENICE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "aion-labs-aion-2-0",
"messages": [{ "role": "user", "content": "Explain quantum tunneling simply." }]
}'Specifications
Pricing
Billed per token on Venice: $1 per 1M input tokens and $2 per 1M output tokens.
New Venice accounts include a free daily allowance and 500 welcome credits — no credit card required.
Aion 2.0 vs alternatives
| Model | Context window | Strongest at | Open weights | Price (Venice) |
|---|---|---|---|---|
| Aion 2.0 | 128K tokens | Low-cost text & search | No | $1 / $2 |
| DeepSeek V3.2 | 160K tokens | Deep reasoning & Coding | Yes | $0.33 / $0.48 |
| GLM 5.1 | 200K tokens | Multilingual & Coding | Yes | $1.10 / $4.15 |
| Grok 4.3 | 1M tokens | Real-time search & Coding | No | $1.42 / $2.83 |
Affordable text-only model with reasoning, but lacks public benchmarks.
What is it good for?
- •Lighter general-purpose text generation where keeping operational costs low is a priority.
- •Web-grounded research tasks utilizing its integrated web search capability.
- •Drafting long-form content or documents that benefit from the large 32K output limit.
Prompting tips
- •Explicitly instruct the model to use its web search capability when you need real-time or current information.
- •Break complex prompts into step-by-step reasoning instructions to make the most of its reasoning capabilities.
Version history
Initial release from AionLabs.
CurrentCurrent text-only release with reasoning and search.
Frequently asked questions
Aion 2.0 is a text-only large language model developed by AionLabs, released in February 2026. It features a 128K token context window and supports reasoning and web search.
On Venice, Aion 2.0 costs $1.00 per 1M input tokens and $2.00 per 1M output tokens. Cached inputs are billed at a discounted rate of $0.25 per 1M tokens.
No, Aion 2.0 is a proprietary, closed-weights model developed by AionLabs. While it is not open-source, you can try it on Venice using your daily free prompts or account credits.
Yes, Aion 2.0 natively supports both reasoning and web search capabilities on Venice, allowing it to retrieve up-to-date information.
No, Aion 2.0 is a text-only model. It does not support image generation, image input, or any other multimodal workflows.
DeepSeek V3.2 is generally superior. It is an open-weights model that is cheaper ($0.33/$0.48) and has verified benchmark performance, whereas Aion 2.0 lacks public benchmark data.
Venice runs Aion 2.0 under its anonymized privacy tier, stripping your personal metadata. However, because it is served by a third-party provider, the provider may retain and train on prompt data per their policies. For absolute zero-retention, choose an open-source model hosted on Venice's own infrastructure.
Related models
Run Aion 2.0 privately.
No prompt logging. No data used for training. Free to start — no credit card.
