GPT 5.6 Terra - Unifically

GPT 5.6 Terra is a variant in OpenAI’s GPT 5.6 line with strong general-purpose reasoning and instruction following. See the GPT 5.6 Terra model overview on unifically.com.

Model

openai/gpt-5.6-terra


Provider	OpenAI
Name	GPT 5.6 Terra

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-5.6-terra",
    "messages": [
      {"role": "user", "content": "Write a migration plan for moving a monolith to microservices."}
    ]
  }'

Long-context surcharge. Once a request’s prompt exceeds 272,000 tokens, the whole request bills at the long-context rate: input, cache read, and cache write at double the standard rate, and output at 1.5x. Both rates are listed on the pricing page.

Volume discounts are available for almost all models. Reach out at contact@unifically.com to discuss custom pricing.