LLMs e IA - Conexoes e APIs

OpenAI

Passo a Passo

1. Acesse platform.openai.com
2. Crie conta ou faca login
3. Billing > Add payment method
4. API Keys > Create new secret key
5. Copie a chave (so aparece uma vez!)

Conectar no N8N/Make

1. Modulo OpenAI (ChatGPT, DALL-E)
2. Add connection
3. Cole a API Key

Custos (2026)

Modelo	Input	Output
GPT-4 Turbo	$10/M tokens	$30/M tokens
GPT-4o	$5/M tokens	$15/M tokens
GPT-3.5 Turbo	$0.50/M tokens	$1.50/M tokens

DeepSeek

27x mais barato que GPT-4!

Passo a Passo

1. Acesse platform.deepseek.com
2. Crie conta
3. API Keys > Create
4. Copie a chave

Conectar via HTTP (Compativel OpenAI)

URL: https://api.deepseek.com/v1/chat/completions
Headers: Authorization: Bearer {API_KEY}
Body: mesmo formato OpenAI

Custo DeepSeek R1

Input: $0.55/M tokens | Output: $2.19/M tokens

OpenRouter

Multiplos LLMs em uma API

Fallback automatico

Billing unificado

Passo a Passo

1. Acesse openrouter.ai
2. Crie conta
3. Keys > Create Key
4. Copie a chave

Conectar via HTTP

URL: https://openrouter.ai/api/v1/chat/completions
Headers:
  - Authorization: Bearer {API_KEY}
  - HTTP-Referer: seu-site.com
Body: formato OpenAI + campo "model"

Modelos Disponiveis

OpenAI (GPT-4) Anthropic (Claude) Google (Gemini) Meta (Llama) Mistral

Groq

GRATIS!

Passo a Passo

1. Acesse console.groq.com
2. Crie conta
3. API Keys > Create
4. Copie a chave

Conectar via HTTP (Compativel OpenAI)

URL: https://api.groq.com/openai/v1/chat/completions
Headers: Authorization: Bearer {API_KEY}

Llama 3.1 70B

Gratis

Llama 3.1 8B

Gratis

Mixtral 8x7B

Gratis

Limitacoes

Rate limits no tier gratuito. Ideal para prototipagem e testes.

Links Uteis

OpenAI API Keys DeepSeek API Keys OpenRouter Groq Console