GPT-6.1 Terra Pro API

openai/gpt-6.1-terra-pro
This model supports text, image, and file inputs while utilizing a large context window for advanced reasoning.
Context
1.05M tokens
Input
$2.116 / 1M tokens
Output
$10.58 / 1M tokens
Released
Oct 26, 2026

Overview

What Is GPT-6.1 Terra Pro API?

Developed by Open AI, GPT-6.1 Terra Pro is a chat model engineered for complex reasoning tasks. It utilizes a pro mode that allocates more reasoning tokens per request to improve answer quality.

The model supports diverse modalities including text and images. It is built to handle large amounts of information through its extensive context window and file input capabilities.

What GPT-6.1 Terra Pro Brings to the Table

Pro Reasoning

The model utilizes a dedicated mode that spends more reasoning tokens to provide higher-quality answers.

Multimodal Input

Users can provide text, images, and files as inputs for the model to process.

Large Context

The model supports a context window of 1.05M tokens for handling extensive information.

Advanced Tools

Features include parallel tool calls, structured output, and streaming capabilities.

Use cases

Analyzing complex documents and files.

Interpreting and reasoning about image content.

Generating structured outputs for technical tasks.

Processing long-form content with large context requirements.

How to use GPT-6.1 Terra Pro API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to openai/gpt-6.1-terra-pro.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "openai/gpt-6.1-terra-pro",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "openai/gpt-6.1-terra-pro",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-6.1-terra-pro","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

GPT-6.1 Terra Pro API Pricing

TypePrice
Input
$2.116 / 1M tokens
Output
$10.58 / 1M tokens
Cached input
$0.1058 / 1M tokens

Billed per token: $2.116 / 1M input tokens, $0.1058 / 1M cached input tokens and $10.58 / 1M output tokens. Cache writes cost $2.645 / 1M tokens. Reasoning tokens are billed as output. Prompts above 272,000 tokens are billed at $4.232 input and $15.87 output per 1M tokens.

Use cases

Analyzing complex documents and files.

Interpreting and reasoning about image content.

Generating structured outputs for technical tasks.

Processing long-form content with large context requirements.

GPT-6.1 Terra Pro vs other models

ModelInputOutputContextBest for
$2.116 / 1M tokens
$10.58 / 1M tokens
1.05M tokens
Complex reasoning tasks requiring high-quality output.
$2 / 1M tokens
$10 / 1M tokens
1M tokens
Complex coding and agentic work
$2 / 1M tokens
$10 / 1M tokens
1M tokens
Everyday coding and agents
$2 / 1M tokens
$12 / 1M tokens
1M tokens
Everyday coding + agents
$2 / 1M tokens
$10 / 1M tokens
1M tokens
Agentic coding & long-horizon work

Frequently asked questions

GPT-6.1 Terra Pro costs $2.116 / 1M tokens for input and $10.58 / 1M tokens for output on AI/ML API. Cached input is billed at $0.1058 / 1M tokens.

The model supports image and text inputs and produces text outputs.

Pro mode spends far more reasoning tokens per request to achieve higher-quality answers.

Yes, the model supports file input as part of its capabilities.

The model supports a maximum output of 128,000 tokens.

Start building with GPT-6.1 Terra Pro

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