SDKs

LLM API speaks the OpenAI API format, so any existing OpenAI SDK works unchanged — point its base_url (or baseURL) at LLM API and keep your provider's own SDK for its idioms (streaming helpers, types, retries).

base_url: https://api.llmapi.ai/v1
api_key: $LLM_API_KEY

Tools that speak Anthropic's native protocol (like Claude Code) are the one exception — see the Claude Code note for the base URL without /v1.

Vercel AI SDK

import { createOpenAI } from "@ai-sdk/openai";

const llmapi = createOpenAI({
  baseURL: "https://api.llmapi.ai/v1",
  apiKey: process.env.LLM_API_KEY!,
});

const completion = await llmapi.chat({
  model: "gpt-4o",
  messages: [{ role: "user", content: "Hello, how are you?" }],
});

console.log(completion.choices[0].message.content);

OpenAI SDK

import OpenAI from "openai";

const openai = new OpenAI({
  baseURL: "https://api.llmapi.ai/v1",
  apiKey: process.env.LLM_API_KEY,
});

const completion = await openai.chat.completions.create({
  model: "gpt-4o",
  messages: [{ role: "user", content: "Hello, how are you?" }],
});

console.log(completion.choices[0].message.content);

Other languages

For cURL, Python, Java, Rust, Go, PHP, and Ruby examples that don't need an SDK at all (plain HTTP), see Quickstart → Pick your language.