Integrasi API7 min read

How to Migrate from the OpenAI API to Sistematis AI (5 Minutes)

A migration guide from the OpenAI API to Sistematis AI for developers: swap the base URL and API key in Python, Node.js, Laravel, and AI coding tools. No code rewrite, pay with QRIS.

Sistematis AI TeamDiterbitkan August 15, 2026

Why Migrate?#

If your code already uses the OpenAI SDK, migrating to Sistematis AI requires no rewrite. The Sistematis AI endpoint is compatible with the OpenAI format — you only change base_url and api_key. After that: QRIS payments in Rupiah, no credit card, and predictable subscription costs.

This article shows you how to migrate across popular stacks.

Prerequisites#

A Sistematis AI API key — register at sistematis.ai/register; the API key appears automatically in your dashboard once your subscription is active
Endpoint: https://api.sistematis.ai/v1
Models: use Sistematis AI model names (sai-1.0 – sai-1.4) — see the model selection guide

Important: OpenAI model names (gpt-4o etc.) are not guaranteed to map on the chat endpoint — always use sai-1.x slugs in your own code. On the Anthropic-compatible endpoint for Claude Code, Claude name mapping is automatic.

Python (openai SDK)#

Before (OpenAI):

from openai import OpenAI

client = OpenAI(api_key="sk-...")

After (Sistematis AI):

from openai import OpenAI

client = OpenAI(
    api_key="sai-xxxxxxxx",
    base_url="https://api.sistematis.ai/v1",
)

response = client.chat.completions.create(
    model="sai-1.1",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

Streaming is identical to the OpenAI pattern:

stream = client.chat.completions.create(
    model="sai-1.1",
    messages=[{"role": "user", "content": "Write a fibonacci function"}],
    stream=True,
)
for chunk in stream:
    delta = chunk.choices[0].delta
    if delta.content:
        print(delta.content, end="")

Node.js / TypeScript (openai SDK)#

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.SAI_API_KEY,
  baseURL: "https://api.sistematis.ai/v1",
});

const response = await client.chat.completions.create({
  model: "sai-1.1",
  messages: [{ role: "user", content: "Hello!" }],
});

Keep credentials in environment variables (.env):

SAI_API_KEY=sai-xxxxxxxx

Laravel / PHP (guzzlehttp or openai-php)#

With the openai-php/laravel package, set the config in .env:

OPENAI_API_KEY=sai-xxxxxxxx
OPENAI_BASE_URI=https://api.sistematis.ai/v1

Then call it as usual:

use OpenAILaravelFacadesOpenAI;

$result = OpenAI::chat()->create([
    'model' => 'sai-1.1',
    'messages' => [
        ['role' => 'user', 'content' => 'Hello!'],
    ],
]);

Or with raw Guzzle:

$response = $client->post('https://api.sistematis.ai/v1/chat/completions', [
    'headers' => [
        'Authorization' => 'Bearer ' . env('SAI_API_KEY'),
        'Content-Type' => 'application/json',
    ],
    'json' => [
        'model' => 'sai-1.1',
        'messages' => [['role' => 'user', 'content' => 'Hello!']],
    ],
]);

cURL (quick test)#

curl https://api.sistematis.ai/v1/chat/completions \
  -H "Authorization: Bearer sai-xxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "sai-1.1",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

AI Coding Tools#

OpenAI-compatible tools (Cline, Kilo Code, Roo Code, OpenClaw, Hermes Agent): set Base URL https://api.sistematis.ai/v1, your Sistematis AI API key, and pick a sai-1.x model.

Claude Code uses the Anthropic-compatible endpoint — see the Claude Code setup article. Codex uses the Responses endpoint — both are documented at docs/tools.

Migration Checklist#

Change base_url → https://api.sistematis.ai/v1
Change api_key → your Sistematis AI API key (sai- prefix)
Change model names → sai-1.0 … sai-1.4
Remove dependencies on OpenAI-specific features (e.g. hardcoded gpt-4o, embeddings)
Test one non-streaming request, then one streaming request
Watch your quota on the dashboard — 5-hour & weekly percentages

Common Troubleshooting#

401 Unauthorized — Make sure the Authorization: Bearer sai-... header is correct and your subscription is active.

Unknown model — Use sai-1.x slugs, not OpenAI model names, in your own code.

429 Rate Limited — Your 5-hour or weekly quota is exhausted. Check the dashboard; the 5-hour quota resets automatically in the next window.

Conclusion#

Migrating from the OpenAI API to Sistematis AI is essentially a two-line migration: base_url and api_key. Everything else — request format, responses, streaming — is identical to what you already know.

After migrating, you pay in Rupiah via QRIS, with no credit card, and a monthly cost you can budget.

Try it now: register free, migrate your code in 5 minutes, and see the plans starting at Rp7,000/day.

#API Integration#OpenAI#Migration#Tutorial