Free Aion Labs API Key, Base URL & Rate Limits

Model Provider

Aion Labs is an independent AI provider offering its proprietary Aion model family for free.

Free TierFunction Calling

Save API Key Test API Key Get API Key

How to get a free Aion Labs API key

1
Sign up at aionlabs.ai Email registration. No credit card.
Get Aion Labs API key →
2
Go to API Keys in dashboard
3
Generate an API key
4
Choose a model Aion-2.0 for best quality. Aion-1.0-Mini for speed. Daily token allowance.
5
Configure client Base URL: https://api.aionlabs.ai/v1. Review their API docs for the request format.

Provider Snapshot

P Provider Type Model Provider

O OpenAI Compatible No

U Base URL https://api.aionlabs.ai/v1

F Free Tier 3 free models online

P Phone Required No

S Streaming Varies

T Function Calling Yes

V Vision Varies

L Last Updated 2026-07-07

Supported Models 5 models

View in directory →

Model ID	Developer	Context	Availability	Free Tier	Use cases
aion-2-0 Aion 2.0	Aion Labs	128K	Online	Yes	chat
aion-2-5 Aion 2.5	Aion Labs	128K	Online	Yes	chat
aion-rp-1-0-8b Aion-RP 1.0 (8B)	Aion Labs	32K	Online	Yes	chat
aion-1-0 aion-1.0	Aion Labs	131K	Check provider	Yes	chat
aion-1-0-mini aion-1.0-mini	Aion Labs	131K	Check provider	Yes	chat

Developer Tools

K Save API Key Never lose your API keys — save keys from all providers in one place. T Test API Key Test your API key and check quota.

Aion Labs FreeLLM Score free API access score

How we score →

35 /100

🔹 Niche Provider — Consider for easy signup

Generosity Free limits and access terms

Access Signup and key availability

Model Breadth Free model coverage

Reliability Status and stability signals

Compatibility SDK and endpoint support

Quality Model capability signals

What is Aion Labs?

Aion 2.0 — daily token allowance, 131K context, no credit card.

Aion Labs is an independent AI provider offering its proprietary Aion model family for free. The free tier provides a daily token allowance (exact amount unpublished) with 131K context windows across all models. No credit card required. Best suited for lightweight chat and prototyping tasks.

131K context window
Daily token allowance (no hard RPM)
Aion-2.0, Aion-1.0, Aion-1.0-Mini
No credit card required

API Compatibility: Aion REST API (not OpenAI-compatible)

Aion Labs Free Tier Limits & Pricing

Credit Card Not required

Phone Verification Not required

Free Tier 3 free models online

Context Range 32K – 131K

Total Models 5 listed

Rate Limits 15 RPM, 20K TPD · Daily token allowance

API Compatibility Aion REST API (not OpenAI-compatible)

Aion Labs API Setup Tutorials

Claude Code Environment variables and base URL setup Codex OpenAI-compatible config for local coding Gemini CLI Provider-specific API key routing notes

Aion Labs is fully compatible with popular AI coding assistants like Cursor, Claude Code, and more. To see step-by-step API configuration instructions for your favorite tool, please visit our Global Configuration Guide →

Aion Labs Model Use Cases

What Aion Labs's free models are best for, based on aggregated model capabilities:

Chat 5 models

Aion Labs Limitations & Caveats

Unpublished token allowance — hard to plan capacity
Not OpenAI-compatible
Small independent provider with limited track record

Aion Labs FAQ

How does Aion's daily token allowance work?

Instead of a fixed RPM/RPD limit, Aion provides a daily token budget that resets each day. The exact amount isn't published, but users report generous limits for typical prototyping use. Monitor your usage in the Aion dashboard.

What's the difference between Aion-2.0 and Aion-1.0?

Aion-2.0 is the latest flagship model with improved reasoning and instruction-following. Aion-1.0 is the previous generation still available for free. Aion-1.0-Mini is a faster, smaller variant for simple tasks.

Is Aion Labs reliable for production?

Aion Labs is smaller than major providers like Groq or OpenRouter. It's best for prototyping and personal projects. For production use with SLAs, consider a larger provider.