ChatGPT Plus costs $20 a month. Aelius costs nothing.

Chat, documents, code and images, all uncapped.

By sending, you agree to our Terms and Privacy Policy.

Unlimited messages

No daily cap, no monthly cap, no credits to run out.

Unlimited uploads

PDFs, spreadsheets and photos, read together. As many as the question needs.

Unlimited images

Generate as many images as you need.

Pictures made in Aelius, including a teapot recoloured by asking for it in orange.
Search the web when it matters.
Talk to it out loud.
Runs without you. Aelius calls its own tools mid-answer, sets reminders that reach you by email and phone, runs scheduled tasks unattended and reports back in chat, and serves a coding agent for VS Code, Cline or Continue. Reminders, tasks and the Python sandbox need a free account.

Aelius vs. every other AI.

Free plan limits: ChatGPT, Claude, Gemini and Aelius
ChatGPT Claude Gemini Aelius
Messages per dayCapped dynamic cap15–40 / 5h about 15 to 40 messages per 5 hoursUnlimited unlimited textNo cap no daily cap
Uploads images per day2 / day 2 per 24 hoursShared cap counted against messagesMetered number not publishedNo cap no daily cap
Images generated per dayCapped daily capNone not offeredMetered number not publishedNo cap no daily cap
Price to lift the caps$20per month ChatGPT Plus$20per month Claude Pro$19.99per month Google AI Pro$0free

Free plans, as published October 2026. Metered: a limit exists, its number is not published.

Integrate us into
your VS Code.

The same loop as Claude Code, in the editor you already have.

The whole setup. No plugin.
export OPENAI_BASE_URL=https://code.aeliusai.com/v1
export OPENAI_API_KEY=$AELIUS_KEY
export OPENAI_MODEL=qwen3.8-27b
Speaks to
Qwen Code opencode Cline Continue Roo Code Aider anything OpenAI compatible

The same class of model.
At no cost.

How it is served
Artificial Analysis Intelligence Index v4.1.1, higher is better

Read August 2026: a composite of nine evaluations run the same way for every model, reasoning models at their maximum setting. Eleven of the 181 models on the board: the leader, the four either side of us, and the flagships we are above. Bars start at zero.

90.3LiveCodeBench v6
61.7SWE-bench Pro, agentic coding
73.0Terminal-Bench 2.1
30.8Humanity's Last Exam, no tools

Private by default.

Read the privacy policy
Answered on our own servers.
Never trained on. Never sold.
Incognito keeps no history.
Control how your data is stored.

The same model,
over HTTPS.

Our own JSON API for vision and schema-checked output, called from your own code. Access is asked for and granted by a person, not handed out on signup — which is what keeps the queue short enough to be worth having. Separate from Aelius Code above: that one is free with any account and needs no request.

API documentation
POST /api/ext/v1/vision
curl -X POST https://aeliusai.com/api/ext/v1/vision \
  -H "Authorization: Bearer $AELIUS_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "What is in this picture?",
    "images": ["https://example.com/photo.jpg"],
    "thinking": false
  }'

# Response
{
  "text": "…",
  "finish_reason": "stop",
  "usage": { "prompt_tokens": 1308, "completion_tokens": 638 }
}
Text, vision and JSON.Give it a schema and every response parses. Your own system prompt and sampling.
ael_sk_ keys, reviewed before issue Keys stored as a SHA-256 hash only 429 carries Retry-After X-Request-Id on every response
Request access Want it in your editor? Aelius Code, free

Tell us what you are building and we will come back to you. Free either way — the review is about capacity, not price.

Questions people ask.

Answered straight. The limits, the privacy terms and what it costs, in plain words.

Is Aelius a free ChatGPT alternative?

Yes. Aelius is a free AI chat assistant with unlimited messages, unlimited file uploads and free image generation. It answers questions, writes and reviews code, reads your documents, and is never trained on what you type.

How is Aelius free?

Aelius runs open-weights models on hardware we own and operate ourselves, so there is no per-token API bill to pass on to you. What it costs us is electricity, which does not climb with every message the way an API bill would.

Are there message limits?

There is no daily or monthly message cap and there are no credits to run out. A short rate limit exists to stop automated abuse, and ordinary conversation does not come close to it.

Do I need an account to use Aelius?

No. You can start a conversation straight away without signing up. A free account keeps your chat history across devices and lifts the limits that apply to guests.

Is there a limit on file and image uploads?

There is no upload meter and no monthly allowance. Attach as many files as a question needs.

Do you train on my conversations?

No. Your conversations are never used to train a model, and they are never sold or handed to advertisers.

Are my chats stored, and can I delete them?

Chats are saved to your account so you can come back to them. You can permanently delete any conversation, or delete your account and everything in it. Incognito chats are never written to disk at all.

Start without an account.

Ask something now. Sign up when you want your history kept.

QR code that opens Aelius on the App Store

Get Aelius on your iPhone

Free for iPhone and iPad. Sign in with the same account and your chats are there.

  1. Open the Camera on your iPhone
  2. Point it at the code
  3. Tap the link, then Get

Android app coming soon. Until then, Aelius works in Chrome on Android: menu, then Add to Home screen.