GPT-5.6 Terra API

Input / 1M tokens$1.76~~$2.00~~

Output / 1M tokens$10.56~~$12.00~~

LLMOpenAI12% below official922K contextPrompt caching

Loading playground…

About GPT-5.6 Terra

GPT-5.6 Terra by OpenAI is available on API Many from $1.76 per million input tokens and $10.56 per million output tokens, and you call it with the same API key you use for every other model.

It accepts OpenAI-style chat requests with streaming and tools, has a 922K context window and can return up to 12,800 tokens per response.

Prompt caching is supported: cached input tokens are billed at the lower cached rate shown in the price table.

You pay only for successful results: failed or rejected requests are refunded automatically, and every call is recorded in your console with its exact cost.

Related models

−12%

GPT-5gpt-5

LLMOpenAI128K contextPrompt caching

$1.10 in · $8.80 outTry it

−12%

GPT-5 (2025-08-07)gpt-5-2025-08-07

LLMOpenAI

$1.10 in · $8.80 outTry it

−12%

GPT-5 Chat Latestgpt-5-chat-latest

LLMOpenAI

$1.10 in · $8.80 outTry it

−12%

GPT-5 Codexgpt-5-codex

LLMOpenAICoding

$1.10 in · $8.80 outTry it

−12%

GPT-5 Minigpt-5-mini

LLMOpenAI128K contextPrompt caching

$0.22 in · $1.76 outTry it

−12%

GPT-5 Mini (2025-08-07)gpt-5-mini-2025-08-07

LLMOpenAI

$0.22 in · $1.76 outTry it

−12%

GPT-5 Nanogpt-5-nano

LLMOpenAI128K contextPrompt caching

$0.044 in · $0.352 outTry it

−12%

GPT-5 Nano (2025-08-07)gpt-5-nano-2025-08-07

LLMOpenAI

$0.044 in · $0.352 outTry it

Frequently asked questions

How much does the GPT-5.6 Terra API cost?

GPT-5.6 Terra starts at $1.76 per million input tokens and $10.56 per million output tokens on API Many. The price table on this page lists every tier; you are charged only for successful requests.

How do I call GPT-5.6 Terra?

Create an API key in the console, then send a request to /v1/chat/completions with "model": "gpt-5.6-terra". The API tab has copy-ready examples in cURL, Python and Node.js.

Is this the official GPT-5.6 Terra model?

Yes. Requests are forwarded to the model maker or an authorized channel with the same parameters, so the output matches the official API.

What happens if a request fails?

Failed, rejected or timed-out requests are not charged. Reserved balance is released automatically and the reason is shown in the call record.