AI & LLM API Comparison 2026

// Anthropic — Node.js
import Anthropic from '@anthropic-ai/sdk';

const client = new Anthropic();

const message = await client.messages.create({
  model: 'claude-sonnet-4-6',
  max_tokens: 200,
  messages: [
    { role: 'user', content: 'Explain quantum computing in 3 sentences.' },
  ],
});

console.log(message.content[0].text);
// "Quantum computing harnesses quantum mechanics..."

// Google Gemini — Node.js
import { GoogleGenAI } from '@google/genai';

const ai = new GoogleGenAI({
  apiKey: process.env.GEMINI_API_KEY,
});

const response = await ai.generateContent({
  model: 'gemini-2.5-pro',
  contents: 'Explain quantum computing in 3 sentences.',
});

console.log(response.text);
// "Quantum computing leverages superposition..."

// Mistral — Node.js
import { Mistral } from '@mistralai/mistralai';

const client = new Mistral({
  apiKey: process.env.MISTRAL_API_KEY,
});

const response = await client.chat.complete({
  model: 'mistral-large-latest',
  messages: [
    { role: 'user', content: 'Explain quantum computing in 3 sentences.' },
  ],
});

console.log(response.choices[0].message.content);
// "Quantum computing operates on qubits..."

// Groq — Node.js (OpenAI-compatible)
import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: process.env.GROQ_API_KEY,
  baseURL: 'https://api.groq.com/openai/v1',
});

const response = await client.chat.completions.create({
  model: 'llama-3.3-70b-versatile',
  messages: [
    { role: 'user', content: 'Explain quantum computing in 3 sentences.' },
  ],
});

console.log(response.choices[0].message.content);
// Response in ~0.3 seconds (500+ tok/s)

// Together.ai — Node.js (OpenAI-compatible)
import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: process.env.TOGETHER_API_KEY,
  baseURL: 'https://api.together.xyz/v1',
});

const response = await client.chat.completions.create({
  model: 'meta-llama/Meta-Llama-3.1-405B-Instruct-Turbo',
  messages: [
    { role: 'user', content: 'Explain quantum computing in 3 sentences.' },
  ],
});

console.log(response.choices[0].message.content);
// Llama 3.1 405B — largest open-source model