KeyoAPI

GPT-5.6 Terra API — Everyday Flagship Chat

GPT-5.6 Terra is KeyoAPI’s everyday flagship chat model for Q&A, writing, and general assistants.

gpt-5.6-terra is a llm model on KeyoAPI, a prepaid AI API gateway: call it at POST /v1/chat/completions, billed at ~$0.37 / $2.21 per 1M in/out from the same balance that covers chat, vision, OCR and video models.

Listed price: ~$0.37 / $2.21 per 1M in/out · Live catalog: Model Square · Static list: pricing list.

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Overview

If you want lower GPT API pricing without rewriting clients, KeyoAPI keeps the OpenAI-compatible request shape. Terra covers the broad middle of product traffic: onboarding help, content drafts, light analysis, and tool-calling assistants. Because KeyoAPI is an ai api relay, you can keep Terra as default and still call Claude or Whisper on the same key. Indicative rates ~$0.37 / $2.21 per 1M in/out—often dramatically below OpenAI GPT-4o list pricing. Finance teams use the model comparison page to justify migration; engineers use the pricing page for live confirmation. Consumer chat features, internal knowledge bots, marketing copy helpers, and CRUD app copilots. Batch rewrite jobs that are too expensive on first-party flagship rates. Chat completions with model=gpt-5.6-terra. Base URL https://www.keyoapi.xyz/v1. Start at the full pricing list. Terra is the everyday GPT-class default for Q&A and assistants. Route only the hard tail to Sol or Claude so gpt api pricing stays finance-friendly. Terra is the GPT-class default for products that need reliable Q&A without burning the GPT-4o list price. Wire it into onboarding bots, help centers, and CRUD copilots first. Keep a shadow eval that compares Terra vs Luna on your hardest ten prompts weekly so you know when to escalate. Use streaming for UI latency and store token usage per tenant for chargebacks. GPT API pricing becomes a board-friendly story when Terra handles the median request and Sol/Claude handle the p95. KeyoAPI’s OpenAI-compatible path means Cursor, LangChain, and official SDKs need only a base URL swap. Terra pairs well with Whisper transcripts and MinerU markdown: one key, one invoice. Instrument p95 latency and dollars per conversation. If Terra quality slips on a vertical, escalate that vertical to Sol instead of swapping the global default.

How to call it

Base URL: https://www.keyoapi.xyz/v1

Endpoint: POST /v1/chat/completions

Model: model=gpt-5.6-terra

curl https://www.keyoapi.xyz/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-5.6-terra","messages":[{"role":"user","content":"Hello from KeyoAPI"}]}'

Auth uses the same Bearer API key as chat. Full notes: Keyo docs.

FAQ

Is Terra a drop-in for GPT-4o-style apps?

It is designed as a flagship everyday chat model on an OpenAI-compatible API. Point your SDK at KeyoAPI and set model=gpt-5.6-terra.

How does GPT API pricing compare?

See the model comparison page for AI API price comparison versus OpenAI list rates, and the full pricing list for live Keyo numbers.

Terra vs Sol vs Luna?

Terra is the everyday flagship; Sol is stronger reasoning; Luna is the high-volume 5.6-family lane.

Related models

GPT-5.6 Sol API GPT-5.6 Luna API Claude Sonnet 5 API

Guide for gpt-5.6-terra. Catalog: the pricing page · Rates: the full pricing list.