OpenAI Compatibility

Migrating from OpenAI

Python
JavaScript

from openai import OpenAI

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

# After (Lilac) — just change base_url and api_key
client = OpenAI(
    base_url="https://api.getlilac.com/v1",
    api_key="your-lilac-api-key",
)

# Everything else stays the same
response = client.chat.completions.create(
    model="moonshotai/kimi-k2.6",
    messages=[{"role": "user", "content": "Hello!"}],
)

import OpenAI from "openai";

// Before (OpenAI)
const client = new OpenAI({ apiKey: "sk-..." });

// After (Lilac) — just change baseURL and apiKey
const client = new OpenAI({
  baseURL: "https://api.getlilac.com/v1",
  apiKey: "your-lilac-api-key",
});

Endpoint	Status
`POST /v1/chat/completions`	Supported
`POST /v1/completions`	Supported (legacy)
`POST /v1/responses`	Supported
`GET /v1/models`	Supported

Endpoint

Status

POST /v1/chat/completions

Supported

POST /v1/completions

Supported (legacy)

POST /v1/responses

Supported

GET /v1/models

Supported

Supported Features

Feature	Status
Chat completions	Supported
Streaming	Supported
System messages	Supported
Vision (image inputs)	Supported
Tool / function calling	Supported
Structured output (JSON mode)	Supported
Reasoning (thinking on/off)	Supported
Temperature, top_p, top_k, min_p	Supported
Frequency & presence penalties	Supported
Log probabilities	Supported
Seed (deterministic sampling)	Supported
Stop sequences	Supported
Multiple choices (n)	Supported

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OpenAI Compatibility

Migrating from OpenAI

Supported Endpoints

Supported Features

Not Yet Supported

​Migrating from OpenAI

​Supported Endpoints

​Supported Features

​Not Yet Supported

Migrating from OpenAI

Supported Endpoints

Supported Features

Not Yet Supported