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Aion Labs free tier

🔌 LLM APIs with free tier · no card · live — last verified by a probe on 2026-10-26 · aionlabs.ai · back to the whole list

What you get

OpenAI-compatible text-model API with a daily credit allowance on its $0 Free tier, no card required

Free models

The free offer is a budget for model usage across the catalog. See Limits for its conditions and Connect for API details, where available.

Limits, in the vendor’s words

Daily credits allowance: amount not published; 15 requests/minute; 20,000 tokens/minute; 20,000 tokens/day per account

The reset timezone is unpublished. Request and token ceilings apply separately from the credit balance; completions are billed at each model’s price. An account and API key are required. The Terms call free use before purchase a courtesy that may be changed or withdrawn.

Where it is offered

The vendor names no country it keeps the offer from (source, read 2026-10-10).

What happens to what you send

What you send is not used to train models. In the vendor’s words: “We do not use your Input or Output to train models and we do not sell them.” (source).

Connect

Base URL: https://api.aionlabs.ai/v1
Key: AION_LABS_API_KEY — get one at https://www.aionlabs.ai/app/api-keys/
Callable ids: aion-labs/aion-3.5, aion-labs/aion-3.5-mini, aion-labs/aion-3.0-mini, aion-labs/aion-3.0, aion-labs/aion-2.0, aion-labs/aion-rp-llama-3.1-8b
Note: Create an API key in the dashboard and send it as a bearer token with the OpenAI Chat Completions format.

Try it from your terminal with your key in AION_LABS_API_KEY — it goes from your machine to the vendor and nowhere else:

curl -s https://api.aionlabs.ai/v1/chat/completions \
  -H "Authorization: Bearer $AION_LABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"model":"aion-labs/aion-3.5","messages":[{"role":"user","content":"2+2? MAKE NO MISTAKES."}]}'

Evidence

Probe: the page at https://www.aionlabs.ai/pricing/, anchored on A daily credit allowance to try agent jobs, the API, and browser chat, No card required; ids checked in https://api.aionlabs.ai/v1/models
Source: https://www.aionlabs.ai/pricing/
Source: https://www.aionlabs.ai/docs/
Source: https://www.aionlabs.ai/docs/quickstart/
Source: https://www.aionlabs.ai/docs/rate-limits/
Source: https://api.aionlabs.ai/v1/models
Source: https://www.aionlabs.ai/terms/
Source: https://www.aionlabs.ai/privacy/

History

Each line is a change to what this page publishes, dated the day it reached the list, in UTC.

2026-10-10 — Added: OpenAI-compatible text-model API with a daily credit allowance on its $0 Free tier, no card required

Generated from registry.yaml on 2026-10-28 and re-verified twice a week; the full list, the Atom feed and the machinery are at https://github.com/mvalentsev/awesome-free-ai-coding.

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