Aion Models by AionLabs
3 models2026Up to 128k ctxFrom $0.8/1M input
Details
ResearcherAionLabs
LicenseProprietary
Commercial useCommercial use with conditions
Models3
Released2026
Max context128k
Capabilities
Reasoning2 of 3 models
Function CallingAll models
Tool UseAll models
Structured Outputs2 of 3 models
Links
WebsiteAbout
Aion is a family of models from AionLabs targeting reasoning, coding, and immersive roleplay use cases, including multi-model systems and distilled variants.
Current Variants
Use-when guidance is derived from seed capabilities, context, release, and replacement fields.
3 in view
Aion 2.0Current
Use when the workload needs 128k context, tool use, and function calling.
2026-04128k contexttool usefunction calling
Aion 1.0Current
Use when the workload needs 128k context, reasoning, and tool use.
2026-01128k contextreasoningtool use
Aion 1.0 MiniCurrent
Use when the workload needs 128k context, 32B parameters, and reasoning.
2026-01128k context32B parametersreasoning
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Aion 2.0 | Use when the workload needs 128k context, tool use, and function calling. | 2026-04 | 128k contexttool usefunction calling | Current |
| Aion 1.0 | Use when the workload needs 128k context, reasoning, and tool use. | 2026-01 | 128k contextreasoningtool use | Current |
| Aion 1.0 Mini | Use when the workload needs 128k context, 32B parameters, and reasoning. | 2026-01 | 128k context32B parametersreasoning | Current |
Release Timeline
2 release groups2026-04
1 current
Aion 2.0
Current128k contexttool usefunction calling
2026-01
2 current
Aion 1.0
Current128k contextreasoningtool use
Aion 1.0 Mini
Current128k context32B parametersreasoning
Specifications(3 models)
| Model | Released | Context | Parameters | Reasoning | Fn Calling | Tool Use | Structured Outputs |
|---|---|---|---|---|---|---|---|
| Aion 2.0 | 2026-04 | 128k | — | No | Yes | Yes | No |
| Aion 1.0 | 2026-01 | 128k | — | Yes | Yes | Yes | Yes |
| Aion 1.0 Mini | 2026-01 | 128k | 32B | Yes | Yes | Yes | Yes |
Available From(1 provider)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| Aion 2.0 | OpenRouter | $0.8 | $1.6 | Serverless |
Frequently Asked Questions
- What is Aion used for?
- Aion is used for reasoning, agent workflows and tool use, and structured outputs. The family description and listed model capabilities point to those workloads as the best fit.
- How does Aion compare to Claude 3?
- Aion by AionLabs is strongest where you need reasoning, while Claude 3 by Anthropic is the closest related family to check for vision and multimodal work. Aion has 3 listed variants and reaches up to 128k context, while Claude 3 reaches up to 200k context, so compare the specs and pricing tables before choosing a production model.