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.

Listed price: ~$0.37 / $2.21 per 1M in/out · Confirm live rates on interactive pricing.

Overview

GPT-5.6 Terra is KeyoAPI’s everyday flagship chat model for Q&A, writing, and general assistants. 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 /compare to justify migration; engineers use /pricing 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 /pricing/gpt-5.6-terra. 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.

Quick start

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"}]}'

FAQ

Related models

Guide for gpt-5.6-terra. Try/buy: /pricing/gpt-5.6-terra · Catalog: /pricing.