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OpenAI · API model

GPT-5.6 Terra

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...

Context
1.05M
Input / 1M
$2
Output / 1M
$12
Released
Jul 9, 2026
Specifications

GPT-5.6 Terra specs

Provider
OpenAI
Type
API model
Model ID
openai/gpt-5.6-terra
Context window
1,050,000 tokens1.05M
Input price
$2per 1M input tokens
Output price
$12per 1M output tokens
Accepts
file, image, text
Produces
text
Released
Jul 9, 2026
Popularity
34/100position #64 in OpenRouter's weekly usage ranking
Source
OpenRouter
Overview

About GPT-5.6 Terra

GPT-5.6 Terra is an API model from OpenAI, released on Jul 9, 2026, with a context window of 1,050,000 tokens, pricing of $2 per million input tokens and $12 per million output tokens. It accepts file, image, text input and produces text output.

At listed prices, a request with 10,000 input tokens and 1,000 output tokens costs about $0.032.

Specs are sourced from OpenRouter and were last checked on Nov 3, 2026. Always confirm current pricing and limits with the provider before production use.

Tool callingStructured outputsJSON modeReasoning
FAQ

GPT-5.6 Terra questions

What is the context window of GPT-5.6 Terra?

GPT-5.6 Terra supports a context window of 1,050,000 tokens.

How much does GPT-5.6 Terra cost?

GPT-5.6 Terra is listed at $2 per million input tokens and $12 per million output tokens on OpenRouter.

When was GPT-5.6 Terra released?

GPT-5.6 Terra was published on Jul 9, 2026.

What inputs does GPT-5.6 Terra accept?

GPT-5.6 Terra accepts file, image, text input and produces text output.