Aion 2.0 Free API on Aion Labs

Free API

Available from Aion Labs

Catalog profile Tool use provider catalog metadata

Aion 2.0 — free model from Aion Labs.

Free APIAion Labs nativeTool callingJSON modeText

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Context window 128K

Max output 32K

API format Aion Labs native

Status Online

AI Recommendation

Should you use Aion 2.0?

Aion 2.0 is listed for chat workloads and supports a 128K context window.

Use it when Aion Labs's free tier is enough for evaluation, demos, or light production traffic.

Best for

Chat

Strengths & Weaknesses

Strengths

Long context window
Tool calling support
Structured JSON output

Watch outs

Free-tier rate limits apply
Vision support is not listed

Model Metadata

Aion 2.0 model ID and technical details

Provider catalog

Model ID aion-2-0

Family aion-2-0

Released Feb 23, 2026

Last updated Jul 7, 2026

Free listing since Feb 23, 2026

Input text

Output text

Capabilities tool calling, structured output

Availability

Aion 2.0 availability by provider

Current provider only

We only found this aion-2-0 listing on Aion Labs in the current catalog. Use the related models section for nearby alternatives.

Provider	Model listing	Access	Context	API	Limits
Aion Labs	Aion 2.0	Free tier	128K	Native	15 RPM, 20K TPD

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Compare

Aion 2.0 alternatives to consider

Open comparison

Model	Provider	Context	Access
Aion 2.5	Aion Labs	128K	Free tier
Aion-RP 1.0 (8B)	Aion Labs	32K	Free tier
aion-1.0	Aion Labs	131K	Check provider
aion-1.0-mini	Aion Labs	131K	Check provider

Typical Use Cases

Aion 2.0 use cases

Chat

Aion 2.0 is tagged for chat in this catalog.

FAQ

Aion 2.0 free API FAQ

Is Aion 2.0 free to use?

Aion 2.0 is listed with free API access on Aion Labs, subject to the provider's quota and account policy.

What is the Aion 2.0 model ID?

The model ID shown in this catalog is aion-2-0.

What are the Aion 2.0 free tier rate limits on Aion Labs?

The listed free tier limit is 15 RPM, 20K TPD. Limits can change per account tier, so confirm against the provider dashboard.

What context window does Aion 2.0 support?

The listed context window is 128K tokens with up to 32K output tokens.

More about Aion 2.0