Model · OpenAI

OpenAI GPT-5.6 Terra

OpenAI GPT-5.6 Terra is served by OpenAI through OpenRouter. It provides 1.05M tokens of context and supports text, vision, files inputs.

Key facts

Best-fit workloads

Cost estimates

These examples use the 2026-10-16 input and output prices. Cache discounts, provider surcharges and tool fees are excluded.

OpenRouter API quickstart

Run these examples from your server or edge function. Keep the OpenRouter API key private and do not expose it in browser code.

cURL

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.6-terra",
    "messages": [{ "role": "user", "content": "Summarize this document in five bullet points." }],
    "max_tokens": 500
  }'

JavaScript / TypeScript

const response = await fetch("https://openrouter.ai/api/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.OPENROUTER_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "openai/gpt-5.6-terra",
    messages: [{ role: "user", content: "Summarize this document in five bullet points." }],
    max_tokens: 500,
  }),
});

const data = await response.json();
console.log(data.choices[0].message.content);

How to evaluate OpenAI GPT-5.6 Terra

1. Run five real tasks from your product, not generic demo prompts.
2. Record token usage, latency and output quality.
3. Estimate cost using your real input/output mix.
4. Compare it against one model with a similar price and one stronger model.

Compare models View on OpenRouter ↗

OpenAI GPT-5.6 Terra FAQ

Pricing and context data are based on a 2026-10-16 snapshot. Provider limits can change; always verify on OpenRouter before production.