GPT-5.6 Terra Pro | OpenAI Frontier LLM API Pricing

Name: GPT 5.6 Terra Pro API
Brand: openai
Price: 2 USD
Availability: InStock

API Usage

Use the following code examples to integrate with our API:

import OpenAI from 'openai';

if (!process.env.WAVESPEED_API_KEY) throw new Error('Set WAVESPEED_API_KEY');
const client = new OpenAI({
  apiKey: process.env.WAVESPEED_API_KEY,
  baseURL: 'https://llm.wavespeed.ai/v1',
  timeout: 120_000,
  maxRetries: 2,
});

try {
  const response = await client.chat.completions.create({
    model: 'openai/gpt-5.6-terra-pro',
    messages: [{ role: 'user', content: 'Hello!' }],
  });
  console.log(response.choices[0]?.message?.content ?? '');
} catch (error) {
  console.error('LLM request failed:', error);
  process.exitCode = 1;
}

import OpenAI from 'openai';

if (!process.env.WAVESPEED_API_KEY) throw new Error('Set WAVESPEED_API_KEY');
const client = new OpenAI({
  apiKey: process.env.WAVESPEED_API_KEY,
  baseURL: 'https://llm.wavespeed.ai/v1',
  timeout: 120_000,
  maxRetries: 2,
});

try {
  const response = await client.chat.completions.create({
    model: 'openai/gpt-5.6-terra-pro',
    messages: [{ role: 'user', content: 'Hello!' }],
  });
  console.log(response.choices[0]?.message?.content ?? '');
} catch (error) {
  console.error('LLM request failed:', error);
  process.exitCode = 1;
}

Model Introduction

OpenAI: GPT-5.6 Terra Pro

GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with reasoning.mode set to pro for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

This model is imported from OpenRouter metadata and exposed through the WaveSpeed AI OpenAI-compatible API for chat completions and compatible application workflows.

Why It Looks Great

text+image+file->text architecture for file, Image, Text to Text workloads
1050000 context window for long prompts, document analysis, and multi-turn workflows
Competitive pricing at $2/$12 per million tokens
Vision input support for image understanding and multimodal tasks
Function calling and tool-use support for agentic application workflows
Structured output support for JSON responses and schema-constrained generation
Reasoning controls available through supported OpenRouter parameters

Key Features

Context Window: 1050000 tokens
Max Input: 922000 tokens
Max Output: 128000 tokens
Vision: Supported
Function Calling: Supported
Structured Outputs: Supported
Image Generation: Not listed
Audio Input: Not listed
Supported Parameters: include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools

Specifications

Specification	Value
Provider	openai
Model Type	Chat Completions model
Architecture	text+image+file->text
Context Window	1050000 tokens
Max Input	922000 tokens
Max Output	128000 tokens
Input	file, Image, Text
Output	Text
Vision	Supported
Function Calling	Supported
Structured Outputs	Supported
OpenRouter Created	July 9, 2026

Pricing

Token Type	Cost
Input	$2 per million tokens
Output	$12 per million tokens
Cached Input	$0.2 per million tokens
Cache Write (5m)	$2.5 per million tokens
Web Search	$20000 per million tokens

Note: Pricing is generated from OpenRouter model metadata. If multiple upstream providers expose different endpoint prices, review and adjust the price before publishing.

How to Use

Write your prompt - describe the task, provide context, and specify the desired output format.
Submit - the model processes your request and returns the response.

API Integration

Base URL: https://llm.wavespeed.ai/v1 API Endpoint: chat/completions Model ID: openai/gpt-5.6-terra-pro

API Usage

Python SDK

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://llm.wavespeed.ai/v1"
)

response = client.chat.completions.create(
    model="openai/gpt-5.6-terra-pro",
    messages=[{"role": "user", "content": "Hello!"}]
)

print(response.choices[0].message.content)

cURL

curl https://llm.wavespeed.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "openai/gpt-5.6-terra-pro",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Notes

Model: openai/gpt-5.6-terra-pro
Provider: openai
OpenRouter marks the top provider as moderated
Endpoint availability and provider-specific routing may change on OpenRouter

Sources: OpenRouter model metadata.

Frequently Asked Questions about GPT 5.6 Terra Pro

How much does GPT 5.6 Terra Pro cost via the API?+

Pricing on WaveSpeedAI: $2.00 per million input tokens and $12.00 per million output tokens. Prompt caching and batch processing are billed separately and reduce effective cost on long, repetitive workloads.

What is the context window of GPT 5.6 Terra Pro?+

GPT 5.6 Terra Pro supports up to 1050K tokens of context with up to 128K tokens of output per request.

Is GPT 5.6 Terra Pro OpenAI-compatible?+

WaveSpeedAI exposes GPT 5.6 Terra Pro at https://llm.wavespeed.ai/v1 through the OpenAI-compatible Chat Completions interface. Most OpenAI SDK clients work by changing the base URL and API key; optional fields depend on the selected model.

How do I get started with GPT 5.6 Terra Pro?+

Sign in to WaveSpeedAI, create an API key in Access Keys, then send a request to https://llm.wavespeed.ai/v1/chat/completions with the model id shown above. Check the current model catalog for availability, capabilities, and pricing.

Pricing

Try the model

API Usage

Model Introduction

OpenAI: GPT-5.6 Terra Pro

Why It Looks Great

Key Features

Specifications

Pricing

How to Use

API Integration

API Usage

Python SDK

cURL

Notes

Info

Supported Functionality

API Access Guide

GPT 5.6 Terra Pro API

Try GPT 5.6 Terra Pro on WaveSpeedAI

Frequently Asked Questions about GPT 5.6 Terra Pro

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