AionLabs: Aion 3.0
Aion 3.0 is a reasoning model from AionLabs released on Jul 7, 2026. It reads text and writes text, with a 131K token context window and up to 33K tokens per reply.
Show moreShow less
It costs $3 per million input tokens and $6 per million output tokens. Cached input bills at $0.75, 75% less than fresh input.
It supports tool calling, structured JSON output and prompt caching.
3 providers serve it, including Kilo Gateway, NanoGPT and Venice AI.
- Modalities
- In / out price
- $3 / $6 per 1M
- Context
- 131K
- Max output
- 33K
- Released
- Jul 7, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Aion 3.0 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $3 / 1M tokens | |
|---|---|---|
| Output | $6 / 1M tokens | |
| Cached input (read) | $0.75 / 1M tokens | 75% off input |
Aion 3.0 providers
3 providers serve it, including Kilo Gateway, NanoGPT and Venice AI. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Kilo Gateway | $3 | $6 | $0.75 | 131K | 33K |
| NanoGPT | $3 | $6 | $0.75 | 131K | 33K |
| Venice AI | $3.75 | $7.50 | $0.9375 | 128K | 33K |
What Aion 3.0 costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Aion 3.0 through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning - Temperature
temperature
Alternatives to Aion 3.0
Models that take the same inputs and call tools, closest in price, cheaper ones first.
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 30 providers.
by googleFeb 5, 2025$1.25/M input tokens$10/M output tokens30 providers
- Index 25.8
Reads text, images and video. Tool calling, structured output, reasoning. Served by 48 providers.
by moonshotaiJun 12, 2026262K context$1.90/M input tokens$8/M output tokens48 providers
- Index 46.5
Reads text, images and files. Tool calling, structured output, reasoning. Served by 22 providers.
by x-aiSep 16, 2026500K context$2/M input tokens$6/M output tokens22 providers
- Index 39.9
Reads text. Tool calling, structured output, reasoning. Served by 21 providers.
by qwenAug 12, 20261.05M context$2/M input tokens$6/M output tokens21 providers
- 500K context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 29 providers.
by x-aiAug 10, 2026$2/M input tokens$6/M output tokens29 providers
- Index 45.4
Reads text, images, files and video. Tool calling, structured output, reasoning. Served by 30 providers.
by qwenJul 19, 20261M context$2/M input tokens$6/M output tokens30 providers
More from AionLabs
- 262K context
Reads text. Tool calling, reasoning. Served by 2 providers.
by aion-labsSep 23, 2026$3/M input tokens$6/M output tokens2 providers
- 262K context
Reads text. Tool calling, reasoning. Served by 2 providers.
by aion-labsSep 23, 2026$0.70/M input tokens$1.40/M output tokens2 providers
- 131K context
Reads text. Tool calling, structured output, reasoning. Served by 3 providers.
by aion-labsJul 7, 2026$0.70/M input tokens$1.40/M output tokens3 providers
- 131K context
Reads text. Tool calling. Served by 2 providers.
by aion-labsFeb 23, 2026$0.80/M input tokens$1.60/M output tokens2 providers
- 33K context
Reads text. Tool calling. Served by 3 providers.
by aion-labsFeb 4, 2025$0.80/M input tokens$1.60/M output tokens3 providers
Aion 3.0 questions
How much does the Aion 3.0 API cost?
$3 per million input tokens and $6 per million output tokens, with cached input at $0.75. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Aion 3.0?
131,072 tokens of input, and it can write up to 32,768 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Aion 3.0?
3 providers serve it, including Kilo Gateway, NanoGPT and Venice AI. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Aion 3.0 support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Aion 3.0 open source?
No. AionLabs serves it through an API only, so you cannot download the weights or host it yourself.
When was Aion 3.0 released?
Jul 7, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.