OpenAIPaidOperational

GPT-5.6 Terra Xhigh

API model name: gpt-5.6-terra-xhigh

GPT-5.6 Terra Xhigh is OpenAI's chat model, served on the Api.Airforce unified API. Capabilities include Reasoning. It is priced at $0.83 per million input tokens and $4.98 per million output tokens. That is below the provider's $2.00 official input rate. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

Pricing

Input / 1M tokens
$0.83
Output / 1M tokens
$4.98
Cache read / 1M tokens
$0.03
Official input rate
$2.00
Official output rate
$12.00

Api.Airforce price vs. the provider's official rate.-59%

Specifications

Provider
OpenAI
Type
chat model

Capabilities

Reasoning

Benchmarks

Independent evaluations and measured speed from Artificial Analysis.

Measured atSame model, different reasoning effort.
Intelligence Index
42.1/100
Coding Index
76.7/100
GPQA Diamond93%
Humanity's Last Exam43%
SciCode55%
τ²-bench86%
τ-bench Banking40%
Terminal-Bench Hard58%
Output speed120.8 tok/s

GPT-5.6 Terra (Max) · 20.8–42.1

Source: Benchmark data by Artificial Analysis (artificialanalysis.ai)

What is GPT-5.6 Terra Xhigh used for?

  • Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.
  • Complex reasoning — math, coding and step-by-step problem solving.

GPT-5.6 Terra Xhigh vs. similar models

ModelIntelligenceContextInput / 1MOutput / 1M
GPT-5.6 Terra Xhigh42.1—$0.83$4.98
Babbage 002——$0.34$0.34
ChatGPT-4o Latest——$2.75$14.50
Codex Auto Review——$0.09$0.56

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

Related models

GPT-5.6 Terra Xhigh — frequently asked questions

How much does GPT-5.6 Terra Xhigh cost?
GPT-5.6 Terra Xhigh is billed pay-as-you-go at $0.83 per 1M input tokens and $4.98 per 1M output tokens. There is no subscription — you only pay for what you use.
What can GPT-5.6 Terra Xhigh do?
GPT-5.6 Terra Xhigh supports Reasoning.
Is GPT-5.6 Terra Xhigh free to use?
GPT-5.6 Terra Xhigh is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use GPT-5.6 Terra Xhigh via the API?
GPT-5.6 Terra Xhigh is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID gpt-5.6-terra-xhigh with your Api.Airforce API key.
Who makes GPT-5.6 Terra Xhigh?
GPT-5.6 Terra Xhigh is OpenAI's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.