API keys for Claude Code, VS Code and OpenCode

One key.
Claude Code, VS Code and OpenCode.

Use Claude Opus 5.5, Claude Sonnet 5.5, GPT-6 Astra and Gemini 4 Argon in Claude Code, VS Code and OpenCode with one prepaid or monthly key. Pay in USDT, log in with one command, and pay up to 83% less.

See prices Read the setup
No accountPay in USDTWindows, Mac, Linux
4top AI models
up to 83%off list price
365 / 30 daysprepaid / monthly
Win · Mac · Linuxone command to log in or out
Watch

See Nyxo in action

Under two minutes: get your key, log in with one command, and switch models.

4 steps

From payment to your first answer in minutes

Choose an amount

Pick how much usage you want. The bigger the amount, the bigger the discount.

Pay in USDT

Send the exact amount to the address of your order, on BNB Smart Chain (BEP20).

Copy your key

Your key appears on the payment page as soon as the payment is confirmed.

Sign in and start

Run one command on Windows, Mac or Linux and paste your key. Claude Code and VS Code are ready.

Pricing

Pay less for the same models

Your balance is spent at each model’s list price per token. You pay up to 83% less for it.

Choose prepaid credit on any plan, or monthly access on Pro, Max and Ultra at the same purchase price.

Monthly access lasts 30 days. Your daily allowance resets every 24 hours from activation, with no rollover. Renew manually in USDT; no automatic billing. Prepaid and monthly access use separate keys.

Selected plan
You get
$170 of usage
You pay
$40 in USDT
Valid for
365 days
  1. You get a USDT address for this order only.
  2. Send the exact amount within 15 minutes.
  3. Your key appears once the payment is confirmed.

Token estimates assume typical coding use. Each model estimate is an alternative, not an additional allowance. Actual usage varies.

Models

Four top models, one balance

Use any of them with the same key and switch whenever you like.

Anthropic

Claude Opus 5.5

Anthropic’s strongest model. Great for hard coding tasks, big projects and careful reasoning.

/model claude-opus-5.5
Anthropic

Claude Sonnet 5.5

A versatile model for everyday coding, writing and analysis.

/model claude-sonnet-5.5
OpenAI

GPT-6 Astra

OpenAI’s flagship model. Fast, detailed answers for code, analysis and writing.

/model gpt-6-astra
Google

Gemini 4 Argon

Google’s top model. Strong with long files, research and multi-step work.

/model gemini-4-argon
Setup

Log in once. Log out any time.

Your key is asked for hidden and saved only on your computer. Prefer a file? Get a ready setup file on the My key page.

  1. Install Claude Code if you don’t have it yet. How to install
  2. Run the login command for your computer:

    Windows: open PowerShell

    irm nyxo.space/claude | iex

    Mac or Linux: open Terminal

    curl -fsSL https://nyxo.space/claude.sh | bash
  3. Paste your key when asked and press Enter. It stays hidden while you paste.
  4. Open a new terminal window and type claude.

Log out

This removes your key from the computer completely. Then close and reopen your terminal and VS Code.

Windows: open PowerShell

irm nyxo.space/claude-logout | iex

Mac or Linux: open Terminal

curl -fsSL https://nyxo.space/claude-logout.sh | bash
Switch models

Change model in seconds

Claude Code

In Claude Code, type /model and the name:

/model gpt-6-astra

Or start with a model: claude --model gpt-6-astra

VS Code

In VS Code, type /model in the Claude panel, then the name. The choice stays for the next chats.

/model gemini-4-argon

Your own code

In your code, set "model" to the name you want.

model="claude-opus-5.5"

Already have a key?

See its balance and expiry date, download a ready setup file, or top it up.

Open My key
Also from Nyxo

Nyxo Web Chat

A free private AI chat in your browser. No key needed.

A private AI chat that works with your files

Open it in any browser. Ask, upload, run code and edit images in one private chat that is deleted when you close it.

  • Ask anything

    Writing, research, maths and code, with live web search when it needs fresh facts.

  • Attach almost anything

    Up to 20 files per message, up to 500 MB each: documents, sheets, images, code.

  • Run code safely

    A private sandbox runs your code. HTML pages open in a safe live preview.

  • See results in place

    Tables, PDFs, charts, diagrams and maths render right inside the chat.

  • Built-in image tools

    Crop, resize, flip and remove backgrounds, then save a copy.

  • Take your work with you

    Save the whole chat and its files as one .zip before you leave.

  • Live web search

    Ask about today and get answers with links to sources.

  • A files panel per chat

    Preview, edit and download every file in one place.

  • It sees your images

    Share a photo or screenshot and ask about it.

  • Stop any time

    Stop a reply, keep what was written, edit or try again.

  • Your chat in numbers

    Messages, time, words, code runs and workspace size.

  • Your language, your theme

    English, French or Arabic, in light or dark.

Open Nyxo Web, free
Answers with tables and charts
Attach files and ask in plain words
Every file in one panel
Preview before you download
Good to know

Simple rules

Prepaid or monthly

Prepaid credit lasts 365 days from activation or until spent. Monthly access lasts 30 days with a daily allowance.

Top up or renew

Prepaid top-ups add credit and 365 days from the later of expiry or payment. Monthly renewals add 30 days to the same tier and daily allowance; early renewal does not reset current usage. After expiry, a new 30-day period starts at renewal.

One balance, four models

Each request uses balance by its tokens, at the model’s list price. Bigger requests cost more.

Your key stays private

It is hidden while you paste it, never put in a web address, and logout removes it fully. Never share it: anyone with it can spend its balance.

No account, no ID

Pay in USDT. We never ask for a card, bank details or ID.

Fair use

Our Terms apply to every key. Keys used against our usage rules can be blocked.

Read the Terms
Questions

API key FAQ

What is a Nyxo API key?

A prepaid or monthly key that lets Claude Code and VS Code use Claude Opus 5.5, Claude Sonnet 5.5, GPT-6 Astra and Gemini 4 Argon. Pay in USDT for prepaid credit or a 30-day daily allowance.

Does it work on Mac and Linux?

Yes. Windows, Mac and Linux each have a one-line login and logout command, and a ready setup file on the My key page.

How do I log out?

Run the logout command for your computer (shown in Setup), or use the logout file from the My key page. It removes the key fully. Then close and reopen your terminal and VS Code.

How do I switch models?

In Claude Code or the VS Code panel, type /model followed by the name, for example /model gpt-6-astra. In your own code, change the model field.

How do I see my balance?

Open the My key page and paste your key. You see what is used and left, and when the key expires. Running the login command again shows it too.

How long does my key work?

Prepaid credit lasts 365 days from activation or until spent. Monthly access lasts 30 days with a daily allowance. Monthly: 30 consecutive 24-hour allowance windows from activation. Unused daily allowance does not roll over. Renew manually in USDT; no automatic billing. Prepaid and monthly access use separate keys.

How do I top up?

Choose the matching option above, select “Top up / renew” and paste your key. Prepaid top-ups add credit and 365 days from the later of expiry or payment. Monthly renewals add 30 days to the same tier and daily allowance; early renewal does not reset current usage. After expiry, a new 30-day period starts at renewal.

How do I pay?

In USDT on BNB Smart Chain (BEP20). Each order gets its own address. Send the exact amount within 15 minutes; your key appears on the payment page once the payment is confirmed.

Is my key safe?

The login hides your key while you paste it and saves it only on your computer. The My key page never puts it in the address bar and never stores it. Never share your key or put it in public code.

What if I lose my key?

Your key is shown on the payment page for 7 days after payment. Save it somewhere safe. After that, contact us with your order ID.

Is Nyxo Web Chat still free?

Yes. Nyxo Web Chat works in your browser for free, with no key and no account.

Your key is
a few minutes away.

Choose an amount Open My key