For developers who keep building

One API for your AI.
More code. Lower costs.

Code, test, repeat. Access multiple AI models through one API at very low prices. From your first prototype to long development sessions, keep your energy for the code.

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Multiple AIs. One integration.Low prices. Long coding sessions.
CONNECT.CONTROL.CREATE.

Less cost. More code.

Your AI, together.
Your budget, under control.

One entry point to choose a model, track usage and keep building.

One API. Your models.

Switch between catalog models through the same endpoint. Choose the AI for your task without multiplying integrations.

Models

Prices built for more coding.

Compare model prices in your account and choose within your budget. Save the most powerful models for tasks that need them.

Authentication

Usage, made clear.

Track usage and manage API key quotas from your account. Keep a clear view of your spending.

Open the console

An ecosystem without borders

Leading AI. One shared horizon.

Explore major model families, from Grok to DeepSeek, Qwen, Kimi and beyond.

Made for people who build

One connection.
Hours of coding.

Connect compatible tools with your CONSTELLO key and our API URL. Generate, debug and refine code using the models available to your account.

Quickstart
cURL · Python · JavaScript
Replace the token and model ID with values from your account.

From your account to your first request

Ready for your next session?

Sign in
  1. 01

    Create your account.

    Find your access, models and usage in one place.

  2. 02

    Top up and create your key.

    Choose your credit amount, then generate an API key for your tools.

  3. 03

    Send your request.

    Set the API URL and a model available to your account. Send your request and track usage.

FAQ

The right questions.

Straight answers before your first request.

Which AI models can I use?

Check your account catalog for accessible models and their prices. Availability and supported features vary by model.

Can I keep my existing tools?

Tools that accept a custom base URL and the Chat Completions format may be compatible. Check the parameters and features your tool uses.

How does billing work?

Top up your account, then usage is deducted from your credit at the selected model’s rates. Check prices in your account and the total including applicable taxes before paying.

Who is CONSTELLO GATEWAY for?

Developers who code intensively, freelancers and teams who want multiple AI models through one integration while keeping control of their budget.

For long sessions and big ideas

Code more. Spend less.

Quickstart

Control AI API costs with one integration

Coding, debugging and automation call for different models. CONSTELLO brings the catalog’s models together through one API gateway: choose the AI that suits your project while keeping a common entry point.

Manage your budget by comparing input, output and cache prices where available. Spending depends on the model, tokens consumed and applicable CONSTELLO rates. Check prices in CHF in your account before sending requests.

Connect compatible applications, scripts and development tools. Each key belongs to a group: choose a model and protocol available to that group, then track consumption and quotas in your dashboard.

OpenAI, Claude, DeepSeek: choose from the families in the catalog. Access depends on your key’s group and model availability.

Explore models and prices Connect an IDE with an API key