Aion 3.5
aion-labs/aion-3.5262k context Compare →- MedianThe median blended price among comparable offers: one price per provider (its cheapest route), standard tier, current prices only. Priority tiers and prices converted from points are not counted.
- $3.75
- Most expensiveThe highest blended price among comparable offers: one price per provider (its cheapest route), standard tier, current prices only. Priority tiers and prices converted from points are not counted.
- $4.69
- Offers
- 7
- Providers
- 5
Cheapest right now
NanoGPT
The provider's published policy: prompts are not used for training.$3.75 blended / 1M tokens
No change7D- in
- $3.00
- out
- $6.00
- Cached input
- $0.75
Aion 3.5 costs from $3.75 per million tokens (at a 3:1 input:output mix): the lowest current price, at 2 providers, checked on ; 7 offers are listed.
Listed offers, by price
Comparable offersOther offersSolid steps are comparable offers; dashed steps are the other offers, which are not counted in cheapest, median or most expensive.Offers ↑
4
7
Cheapest $3.75
NanoGPT via NanoGPT
Median $3.75
Most expensive $4.69
Venice
$0
$1
$2
$3
$4
Offers not counted in cheapest, median or most expensive (4)
- $3.75 · AionLabs via Kilo Gateway · cannot be designated the cheapest
- $3.75 · Martian via Martian · cannot be designated the cheapest
- $3.75 · Nous Portal via Nous Portal · cannot be designated the cheapest
- $3.75 · AionLabs via OpenRouter · another route of the same provider
Price historyThe cheapest offer each day, against the lab's official list price when it publishes one. Each day at 00:00 UTC, the offer the API would have selected as the cheapest, with the same exclusions as /cheapest. Blended price, promotions included.
| Day | Cheapest offer | Official list price |
|---|---|---|
| 2026-10-25 | $3.75, NanoGPT | – |
| 2026-10-26 | $3.75, NanoGPT | – |
| 2026-10-27 | $3.75, NanoGPT | – |
| 2026-10-28 | $3.75, NanoGPT | – |
| 2026-10-29 | $3.75, NanoGPT | – |
| 2026-10-30 | $3.75, NanoGPT | – |
| 2026-10-31 | $3.75, NanoGPT | – |
| Day | Cheapest offer | Official list price |
|---|---|---|
| 2026-10-02 | $3.75, AionLabs | – |
| 2026-10-03 | $3.75, AionLabs | – |
| 2026-10-04 | $3.75, AionLabs | – |
| 2026-10-05 | $3.75, AionLabs | – |
| 2026-10-06 | $3.75, AionLabs | – |
| 2026-10-07 | $3.75, AionLabs | – |
| 2026-10-08 | $3.75, AionLabs | – |
| 2026-10-09 | $3.75, AionLabs | – |
| 2026-10-10 | $3.75, AionLabs | – |
| 2026-10-11 | $3.75, AionLabs | – |
| 2026-10-12 | $3.75, AionLabs | – |
| 2026-10-13 | $3.75, AionLabs | – |
| 2026-10-14 | $3.75, AionLabs | – |
| 2026-10-15 | $3.75, AionLabs | – |
| 2026-10-16 | $3.75, AionLabs | – |
| 2026-10-17 | $3.75, AionLabs | – |
| 2026-10-18 | $3.75, AionLabs | – |
| 2026-10-19 | $3.75, AionLabs | – |
| 2026-10-20 | $3.75, AionLabs | – |
| 2026-10-21 | $3.75, AionLabs | – |
| 2026-10-22 | $3.75, AionLabs | – |
| 2026-10-23 | $3.75, AionLabs | – |
| 2026-10-24 | $3.75, AionLabs | – |
| 2026-10-25 | $3.75, NanoGPT | – |
| 2026-10-26 | $3.75, NanoGPT | – |
| 2026-10-27 | $3.75, NanoGPT | – |
| 2026-10-28 | $3.75, NanoGPT | – |
| 2026-10-29 | $3.75, NanoGPT | – |
| 2026-10-30 | $3.75, NanoGPT | – |
| 2026-10-31 | $3.75, NanoGPT | – |
| Day | Cheapest offer | Official list price |
|---|---|---|
| 2026-10-01 | $3.75, AionLabs | – |
| 2026-10-02 | $3.75, AionLabs | – |
| 2026-10-03 | $3.75, AionLabs | – |
| 2026-10-04 | $3.75, AionLabs | – |
| 2026-10-05 | $3.75, AionLabs | – |
| 2026-10-06 | $3.75, AionLabs | – |
| 2026-10-07 | $3.75, AionLabs | – |
| 2026-10-08 | $3.75, AionLabs | – |
| 2026-10-09 | $3.75, AionLabs | – |
| 2026-10-10 | $3.75, AionLabs | – |
| 2026-10-11 | $3.75, AionLabs | – |
| 2026-10-12 | $3.75, AionLabs | – |
| 2026-10-13 | $3.75, AionLabs | – |
| 2026-10-14 | $3.75, AionLabs | – |
| 2026-10-15 | $3.75, AionLabs | – |
| 2026-10-16 | $3.75, AionLabs | – |
| 2026-10-17 | $3.75, AionLabs | – |
| 2026-10-18 | $3.75, AionLabs | – |
| 2026-10-19 | $3.75, AionLabs | – |
| 2026-10-20 | $3.75, AionLabs | – |
| 2026-10-21 | $3.75, AionLabs | – |
| 2026-10-22 | $3.75, AionLabs | – |
| 2026-10-23 | $3.75, AionLabs | – |
| 2026-10-24 | $3.75, AionLabs | – |
| 2026-10-25 | $3.75, NanoGPT | – |
| 2026-10-26 | $3.75, NanoGPT | – |
| 2026-10-27 | $3.75, NanoGPT | – |
| 2026-10-28 | $3.75, NanoGPT | – |
| 2026-10-29 | $3.75, NanoGPT | – |
| 2026-10-30 | $3.75, NanoGPT | – |
| 2026-10-31 | $3.75, NanoGPT | – |
Cheapest offer
| Rank | Provider · viaYou buy access through an aggregator: one account and one API that forward your requests to other providers. "Via" names the aggregator; the price is the one it charges you. When "via" says "hosted API", no aggregator is involved: the model belongs to a lab and another provider sells it. | Input $/1M | Output $/1M | Blended $/1MA single price that mixes input and output: 3 input tokens for 1 output token, per million tokens. It makes offers easy to rank; your real cost depends on your own mix. | ContextThe maximum amount of text, counted in tokens, the model can take in and write in a single request. Past this limit, the request is refused or cut. | ConditionsWhat a provider says about how it handles your data and who can sign up: training on prompts, processing region, sign-up requirements. Each comes from the provider's published documents; when nothing is published, it stays unknown. | Signals | Offer |
|---|---|---|---|---|---|---|---|---|
| 1 | 3.00 | 6.00 | 3.75 | 262k | ||||
| 2 | 3.00 | 6.00 | 3.75 | 262k | ||||
| 3 | 3.00 | 6.00 | 3.75 | 262k | Unverified. No public page for this offer: listed, not designated cheapest | |||
| 4 | 3.00 | 6.00 | 3.75 | – | worldwide | Unverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapest | ||
| 5 | 3.00 | 6.00 | 3.75 | 262k | Unverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapest | |||
| 6 | 3.00 | 6.00 | 3.75 | 262k | Fee 5.5%: OpenRouter adds a 5.5% fee when you buy credits (read on openrouter.ai/pricing on Oct 31). Offers are ranked with this fee included. | |||
| 7 | 3.75 | 7.50 | 4.69 | 262k |
No training on promptsPrompts may be used for trainingTraining terms not published
backend not named. The router bills this price itself without naming who serves the model.
-
$3.75NanoGPT
NanoGPT
- in
- $3.00
- out
- $6.00
- Context
- 262k
No training on prompts
-
$3.75AionLabs
direct
- in
- $3.00
- out
- $6.00
- Context
- 262k
Training terms not published
-
$3.75Kilo Gateway
- in
- $3.00
- out
- $6.00
- Context
- 262k
Training terms not publishedUnverified. No public page for this offer: listed, not designated cheapest
Seller's site: Kilo Gateway (opens in a new tab)No public price page for this model -
$3.75Martian
Martian
- in
- $3.00
- out
- $6.00
- Context
- –
Training terms not publishedworldwideUnverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapestbackend not named: The router bills this price itself without naming who serves the model.
-
$3.75Nous Portal
Nous Portal
- in
- $3.00
- out
- $6.00
- Context
- 262k
Prompts may be used for trainingUnverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapestbackend not named: The router bills this price itself without naming who serves the model.
See pricing See pricing at Nous Portal (opens in a new tab)via Nous Portal -
$3.75OpenRouter
- in
- $3.00
- out
- $6.00
- Context
- 262k
Training terms not publishedFee 5.5%: OpenRouter adds a 5.5% fee when you buy credits (read on openrouter.ai/pricing on Oct 31). Offers are ranked with this fee included.
-
$4.69Venice
direct
- in
- $3.75
- out
- $7.50
- Context
- 262k
No training on prompts
No offer matches these filters.
Blended = (3 × input + output) / 4, per million tokens. Prices in USD, converted at the ECB rate when the provider bills in another currency.
Monthly cost for your workload
Computed by the API for the three cheapest offers, per 30-day month.- NanoGPT$270.00per month
- AionLabs$270.00per month+$0.00 vs the cheapest
- Venice$337.50per month+$67.50 vs the cheapest
The estimate could not be updated. Try again in a moment.
Compare Aion 3.5 with
Related models
More from Aion Labs
Same index family
Use this data
The index is queryable. The API is free to use.Free API
curl https://api.inferindex.dev/cheapest?model=aion-labs/aion-3.5MCP server
claude mcp add --transport http inferindex https://mcp.inferindex.dev/mcp