OpenAI: GPT-5.6 Terra Pro

Coming soonQuick start

GPT-5.6 Terra Pro is OpenAI's high-reasoning configuration of GPT-5.6 Terra, released 2026-07, for hard problems where extra deliberation justifies the cost. It spends more reasoning tokens per request than the standard Terra model, improving accuracy on complex tasks at the price of longer, more expensive responses.

This model isn’t available on MirAPI yet, so the prices shown are the official list prices. Create an account to get notified when it goes live.

Modalities
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Price / 1M
$2.00 / $12.00
Context
1.05M
Released
Jul 9, 2026
Knowledge cutoff
Feb 16, 2026

Capabilities

ReasoningVisionTool useLong contextPrompt cachingStructured output

Parameters

Request parameters this model accepts through the API.

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetoolsverbosity

Showcase

Every chat model gets the same three fixed prompts. Outputs are archived verbatim, so you can copy a prompt and reproduce the result.

Task prompt · identical for all models
Build a single-file HTML page using three.js from a CDN: a low-poly planet with a tilted ring of ~200 orbiting particles, a soft key light plus rim light, slow auto-rotation, and drag-to-orbit controls. No build tools — one file only.
Archived output
Archive not published yet

Every model will run this exact prompt, and its output will appear here verbatim with token counts and the cost per run.

Quick start

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.mirapi.ai/v1",   # changed
    api_key=os.environ["MIRAPI_API_KEY"],   # changed
)

resp = client.chat.completions.create(
    model="",
    messages=[{"role": "user", "content": "Hello"}],
)
Wire GPT-5.6 Terra Pro into your product

1M free tokens to start, no card required. It’s OpenAI-compatible, so you only change the base URL.

Start free