Open chat
Live models online now

Every top AI model. No subscription.

Chat and API access to models from labs, unlocked by holding $NIMB instead of paying monthly. Start today with 10 free messages a day, no wallet needed.

Start chatting free

No wallet, no signup. The token launches later. The chat works today.

The chat

One window. Every lab.

Free model Free Visitor

Explain proof of stake like I am new to crypto.

Proof of stake is how many blockchains agree on what happened, without miners burning power.

People lock up coins as a deposit. The network picks some of them to propose and check new blocks. Honest work earns a reward; cheating can cost part of the deposit.

So security comes from what validators stand to lose, not from computing power.

Ask anything
Why

One plan per lab adds up.

The best model changes every few weeks, and each lab sells its own monthly plan. NIMBRA puts them behind one chat, and what you hold sets how much you can use.

The usual way

  • A separate subscription for each lab you want to try
  • A card on file and a renewal date every month
  • An account, an email and a password for each one
  • API access billed apart from the chat

With NIMBRA

  • One chat for all models, switch for any message
  • No card and no renewal: holding sets a daily allowance
  • Your wallet is the account, one signature to sign in
  • The same allowance covers the API, from the Pro tier up

You do not pay for access.
You hold it, and it stays yours.

What you get

What holding opens.

Everything below works in the browser today. Holding decides how far it reaches.

Models from every major labs in one chat

Pick a model for each message. The list is read live from our provider, so new releases show up without a redesign.

Sign in without a transaction

One signature in Rabby or MetaMask proves the wallet is yours. No gas, no approvals, nothing leaves the wallet.

An allowance at provider prices

A daily allowance in dollars of model usage by tier, charged at the provider's own rate. It resets at 00:00 UTC.

The same access over API

OpenAI compatible, from the Pro tier up. Keys are issued to your wallet and can be revoked any time.

History that stays with you

Chats live in your browser. The server keeps only what limits need: model, token counts and cost per request.

How it works

Three steps. The first is free.

  1. 1

    Open the chat

    10 messages a day on a free model, no wallet and no signup.

    Open the chat
  2. 2

    Connect your wallet

    Sign one message in Rabby or MetaMask. You see your tier and allowance right away.

  3. 3

    Hold $NIMB

    Once the token launches, your balance sets the tier. It counts the lowest balance of the last 24 hours.

Tiers

Your balance is your plan.

Set a balance and see what it opens. Tiers and models are read live from the server.

Your tierVisitor
Daily usage…
Models…
API…

Held means the lowest balance in your wallet over the last 24 hours.

Compare every tier and model
Developers

Bring your own code.

Point any OpenAI SDK at our base URL and keep the rest of your code.

  • Keys issued to your wallet with one signature, revoked any time
  • Streaming, cost per request and usage history included
  • Prompts and answers are not stored on our side

Read the API docs

curl
# key from the Token page, Pro tier and up
curl https://nimbra.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $NIMBRA_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemma-4-31b-it:free",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
models live right now
labs in one chat
10free messages a day, no wallet
FAQ

Questions, answered.

Anything else is in the docs.

The token is not out yet. What can I do today?

Use the chat. You get 10 free messages a day on a free model, with no wallet and no signup. You can connect a wallet any time; once $NIMB launches, holding it sets your tier.

Where do I get $NIMB?

It has not launched yet. When it does, the contract address on Elysium will appear on the Token page. Always check the address before buying.

Which models does each tier open?

Visitors get the free model. Higher tiers open standard models, then every model, including flagships.

Is it unlimited?

No. Every tier has a daily allowance in dollars of model usage, shown in your account. When it runs out, the free model keeps working until the reset at 00:00 UTC.

Why the lowest balance over 24 hours?

So the same tokens cannot be passed from wallet to wallet to unlock many accounts at once. Hold steadily and your tier simply follows your balance.

Does signing in cost gas or touch my funds?

No. You sign a plain text message (Sign In With Ethereum). It is not a transaction and cannot move or approve anything.

Do you store my chats?

No. Chat history lives in your browser. The server keeps only what it needs for limits: model, token counts and cost per request.

Can I call the models from my own code?

Yes, from the Pro tier up. The API is OpenAI compatible and spends the same daily allowance as the chat. Create a key on the Token page.

Free to start

Try it before you hold anything.

10 free messages a day on a free model. No wallet, no signup, nothing to cancel.

Start chatting free