How to use Claude, GPT & DeepSeek through one API

You don't have a “which model is best” problem. You have a seven-logins, three-credit-cards, four-invoices problem.

Every serious AI app ends up wanting more than one model. Claude for the hard reasoning. GPT for tool-calling. DeepSeek for the cheap high-volume grunt work. So you sign up everywhere — separate keys, separate dashboards, separate monthly minimums — just to answer one question: which model is actually good for my use case?

One API, one key, one balance

Nexotao is a single OpenAI-compatible gateway that fronts every major model — Claude, GPT, DeepSeek, Grok and more — behind one key and one balance. You point your existing SDK at one base URL and switch models by changing a single string:

from openai import OpenAI

client = OpenAI(
    base_url="https://api.nexotao.com/v1",
    api_key="YOUR_NEXOTAO_KEY",
)

# swap models by changing one string — same key, same balance
resp = client.chat.completions.create(
    model="DeepSeek-V4-Pro",   # or claude-opus-4-8, gpt-5-mini, grok-4.3 …
    messages=[{"role": "user", "content": "Refactor this function..."}],
)

No new SDK, no per-provider migration. It also speaks the Anthropic format, so Claude Code and Anthropic SDKs point at it too. The 5-minute quickstart has the full setup.

Pay per token, not per month

There is no plan and no seat. You top up a balance and every call draws it down by the exact tokens you use — input and output billed separately at each model's live rate. Nothing expires on a billing cycle, so a model you tried once and abandoned costs you nothing next month.

That changes how you experiment. Want to A/B an ultra-cheap workhorse against a frontier flagship on the same prompt? Do it on one balance, in one afternoon, for cents.

What does it cost?

Prices move, so I won't freeze a number in a blog post. The full per-token catalog — every model, in Rupiah and USD, from an ultra-cheap workhorse to a frontier flagship — stays current here: the cheapest AI API pricing (full Rupiah + USD view at nexotao.com/harga). No credit card required either — top up with QRIS or crypto.