Aion 3.5
AionLabs · released Sep 23, 2026
- Type
- Closed
- Input
- $3.00
- Output
- $6.00
- Cached
- $0.75
List price · per 1M tokens · AionLabs at 262K context · source ↗
Our take
Written Sep 27, 2026Aion 3.5 is a text model you reach through a host rather than download, and nothing in our data measures how good its answers are. Both listed offers charge the same rate, so the choice between them is not a price decision.
Use it for long-document work where you would rather not split the input up first, trialled through a host on your own material. Because no benchmark scores are supplied, treat it as a candidate to test rather than a proven pick. Skip it if you need measured evidence of coding, reasoning or chat quality before committing, or if you meant to run the model on your own hardware.
The case for it
- The request capacity is large enough that long documents need not be split up first, though reliable recall across all of it is unverified in our data.
- Two hosts list it at the same rate, so the choice between them is not a price decision.
The case against it
- No benchmark scores are supplied, so it needs a trial on work you can judge yourself.
- Neither offer carries a measured speed, so you cannot tell from our data how quickly it responds.
How good is it?
We hold no score for this model.
So there is no figure here for everyday use, coding, agent work or writing. That is a gap in our data, not a low score.
Where to rent it
Prices checked 4 hours ago — each listing carries its own date.
AionLabs, through OpenRouter
The lab is also the cheapest we hold. The strip above and this offer are the same one, so nothing on this page undercuts AionLabs on 262K of context.
- per 1M tokens
- $3.00 in / $6.00 out
- Context served
- 262K
- Throughput
- ~48 tok/s
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouterOpenRouter's own listing | $3.00 / $6.00checked 4 hours ago | 262K | not measured | Unknown | Unknown | Unknown |
| AionLabsThrough OpenRouter | $3.00 / $6.00checked 4 hours ago | 262K33K max reply | 48 tok/s | No | Yes30 days | Unknown |
OpenRouterAcross the 2 listings we hold: 1 says it does not train on prompts, 0 say they do and 1 does not say. 0 appear in the zero-retention registry we check; the rest are unknown to us.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenRouterOpenRouter's own listing | ✓ | ✓ | ✗ |
| AionLabsThrough OpenRouter | ✓ | ✓ | ✗ |
Tool calling: 2 of 2 listings say yes. JSON output: 2 of 2 listings say yes. Strict schema: 0 of 2 listings say yes, 2 say no.
Models people weigh against Aion 3.5
When we formed this view
Recent changes
What moved
first indexed by our pipelineEach date is the day we first saw the change, or the day the maker announced it.
What we do not know about this model yet
- No independent board has scored it, so we hold no quality figures at all.
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 2 listings does not say whether it trains on prompts.
- We hold no batch or off-peak rate for any of its listings.
Licence and identifiers
What the licence allowsWe hold no licence record for this model. Inside are the identifiers you need to pull it — its Hugging Face repo where we have one, our slug and a machine-readable card.
Licence
We hold no licence record for this model, and no record of published weights either — so we can neither summarise its terms nor point you at the weights.
Identifiers
- Takes in, gives back
- Text in, text out
- Catalogue slug
- aion-labs-aion-3-5