Aion-3.0
Reasoning model for deliberate analysis, multi-step problem solving, and tool use.
- Capability
- —No ECI score yet
- Input
- $3.00per 1M tokens
- Output
- $6.00per 1M tokens
- Context
- 131K33K max output
What it costs
- Input
- $3.00per million tokens
- Output
- $6.00per million tokens
- Blended (3:1)
- $3.75pricier than 84% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $9.00 |
| Team assistant25M input + 5M output tokens | $105.00 |
| Production app250M input + 50M output tokens | $1,050 |
Median of 4 paid API providers on models.dev.
Independent benchmarks
Epoch AI has not published a Capabilities Index score for Aion-3.0 yet.
The details
- Lab
- Aion Labs
- Released
- May 5, 2026
- Context window
- 131,072 tokens
- Max output
- 32,768 tokens
- Inputs
- Text
- Output
- Text
- Reasoning
- Always on
- Tool calling
- Yes
- Structured output
- No
- Weights
- Proprietary
- Availability
- 4 API providerslisted on models.dev
More from Aion Labs
About Aion-3.0
How much does Aion-3.0 cost?
Aion-3.0 costs $3.00 input / $6.00 output per million tokens (median across 4 API providers). At a 3:1 input-to-output mix that is $3.75 per million tokens, more expensive than 84% of the 445 priced models we track.
What is the context window of Aion-3.0?
Aion-3.0 accepts up to 131,072 tokens per request and can write up to 32,768 tokens in one response.
How good is Aion-3.0?
Epoch AI has not published a Capabilities Index score for Aion-3.0 yet.
Is Aion-3.0 open source?
No. Aion-3.0 is proprietary; you use it through an API or partner platforms.
What inputs does Aion-3.0 support?
Aion-3.0 accepts text and replies in text. It is a reasoning model, supports tool calling.
When was Aion-3.0 released?
Aion Labs released Aion-3.0 on May 5, 2026.
What are the best alternatives to Aion-3.0?
The closest current models from other labs on capability, price and release date are Command A Plus (Cohere, $2.50 / $10.00), Kimi K2.7 Code Highspeed (Moonshot AI, $1.90 / $8.00), GPT-5.3 Chat (OpenAI, $1.75 / $14.00) and Qwen3.8 Max Preview (Alibaba (Qwen), $2.00 / $6.00).