GPT 5.4 - Unifically

GPT 5.4 is OpenAI’s flagship general-purpose language model for complex reasoning, coding, and analysis tasks.

Model

openai/gpt-5.4


Provider	OpenAI
Name	GPT 5.4

Supported Endpoints

All three API formats are supported:

Chat Completions — POST /v1/chat/completions
Responses — POST /v1/responses
Messages — POST /v1/messages

Example

curl -X POST https://api.unifically.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "openai/gpt-5.4",
    "messages": [
      {"role": "user", "content": "Design a REST API for a todo application."}
    ]
  }'

GPT 5.4 Nano GPT 5.5

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