How do I use GPT-5.6 Terra through YepAPI?

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

OpenAIText Generation/v1/ai/chat

GPT-5.6 Terra

Access GPT-5.6 Terra through one API key. OpenAI GPT-5.6 Balanced Tier.

GPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. Terra is the everyday GPT-5.6: general coding assistants, document analysis, and agents that need solid reasoning without flagship pricing.

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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 respond in real time.

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

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

✓

Balanced GPT-5.6 tier

Sits between GPT-5.6 Sol and Luna, trading a little peak capability for a lower rate.

✓

Everyday coding and reasoning

Tuned for the broad middle of workloads: code edits, analysis, drafting, multi-step tasks.

✓

1M token context, 128K output

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

✓

Multimodal input

Accepts text, images and files.

Quick start

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

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",
    "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 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 API — pricing, context window & access

GPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. 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 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?

GPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning and agentic tasks, with a 1,050,000-token context window and up to 128,000 output tokens. A GPT-5.6 Terra Pro variant runs it in a higher-effort reasoning mode. 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 via YepAPI

YepAPI serves GPT-5.6 Terra 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 (or the full openai/gpt-5.6-terra). 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 API pricing — $2.95 / 1M input, $17.72 / 1M output

GPT-5.6 Terra 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 use cases

Terra is the everyday GPT-5.6: general coding assistants, document analysis, and agents that need solid reasoning without flagship pricing.

Try GPT-5.6 Terra free

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

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$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 supports a 1.1M token context window with up to 128K output tokens per request.