Aion 2.5 by Aion Labs

Permanent free tier, no credit card required. 15 RPM, 20K tokens/day. Specialized for roleplay and storytelling.

Access
Free API tier
Free limits
15 RPM, 20K TPD
Modality
text
Credit card
Not required
Commercial use
Unclear, verify
Context window
128,000 tokens
Rate limit
15 RPM · 20,000 TPD
Model ID
aion-2.5
Base URL
https://api.aionlabs.ai/v1
Last verified
July 2026

Quickstart

curl https://api.aionlabs.ai/v1/chat/completions \
  -H "Authorization: Bearer $KEY" \
  -d '{"model":"aion-2.5","messages":[{"role":"user","content":"hi"}]}'

Frequently asked

Is Aion 2.5 free?

Yes. Aion Labs offers it as Free API tier with these limits: 15 RPM, 20K TPD. No credit card is required.

Can I use Aion 2.5 commercially?

Commercial terms are not clearly documented. Check the provider's current terms before shipping.

How do I start using Aion 2.5?

Permanent free tier, no credit card required. 15 RPM, 20K tokens/day. Specialized for roleplay and storytelling.

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