How do I use GPT-5.6 Terra Pro through YepAPI?

Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.

OpenAIText Generation/v1/ai/chatReasoning

GPT-5.6 Terra Pro

Access GPT-5.6 Terra Pro through one API key. OpenAI GPT-5.6 Terra Pro Reasoning Mode.

GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with OpenAI's reasoning mode set to pro. Use GPT-5.6 Terra Pro for the steps where correctness is worth the wait — final reviews, hard debugging, planning — and plain GPT-5.6 Terra for the rest.

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2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see GPT-5.6 Terra Pro respond in real time.

POST/v1/ai/chatopenai/gpt-5.6-terra-pro

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Context Window

1.1M tokens

Max Output

128K tokens

Input Price

$2.95 / 1M tokens

Output Price

$17.72 / 1M tokens

Strengths

✓

Pro reasoning mode

Identical weights to GPT-5.6 Terra, with reasoning mode fixed to pro.

✓

Same per-token price

Billed at the same rate as GPT-5.6 Terra; you pay for the additional reasoning tokens.

✓

1M token context, 128K output

Handles up to 1,050,000 input tokens and returns up to 128,000 output tokens per call.

✓

Tools and structured output

Function calling, JSON schema outputs and seeds, as on the base model.

Quick start

Copy this snippet and start making calls with GPT-5.6 Terra Pro.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "openai/gpt-5.6-terra-pro",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Why use GPT-5.6 Terra Pro through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

GPT-5.6 Terra Pro API — pricing, context window & access

GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with OpenAI's reasoning mode set to pro. It pairs a 1,050,000-token context window with up to 128,000 output tokens per response, at $2.95 per 1M input and $17.72 per 1M output tokens through YepAPI.

Through YepAPI you call GPT-5.6 Terra Pro on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text, images, files.

What is GPT-5.6 Terra Pro?

GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with OpenAI's reasoning mode set to pro. It deliberates longer before answering, which improves results on complex, multi-step problems at the cost of latency. Per-token pricing matches GPT-5.6 Terra; the added cost is the longer reasoning it chooses to do. It accepts text, images, files as input, handles up to 1,050,000 tokens of context and returns up to 128,000 output tokens per call.

Build with GPT-5.6 Terra Pro via YepAPI

YepAPI serves GPT-5.6 Terra Pro on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to gpt-5.6-terra-pro (or the full openai/gpt-5.6-terra-pro). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

GPT-5.6 Terra Pro API pricing — $2.95 / 1M input, $17.72 / 1M output

GPT-5.6 Terra Pro costs $2.95 per 1M input tokens and $17.72 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs so you can see exactly what a 128,000-token response cost.

GPT-5.6 Terra Pro use cases

Use GPT-5.6 Terra Pro for the steps where correctness is worth the wait — final reviews, hard debugging, planning — and plain GPT-5.6 Terra for the rest.

Try GPT-5.6 Terra Pro free

Every new YepAPI account includes $5 in free credit with no card required — enough to test GPT-5.6 Terra Pro on your own prompts before committing to paid usage. Create an account, copy your key, and call gpt-5.6-terra-pro right away.

Start generating in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

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What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

Input tokens cost $2.95 per 1M tokens and output tokens cost $17.72 per 1M tokens through YepAPI. No monthly minimums — you only pay for what you use.

GPT-5.6 Terra Pro supports a 1.1M token context window with up to 128K output tokens per request.