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GPT-5.6 Terra

GPT-5.6 model that balances intelligence and cost.

OpenAIgpt-5.6-terra2026-07-09Report incorrect data

Specs

Context
1.05M
Max output
128K
Input price
$2/ 1M tokens
Output price
$12/ 1M tokens
Released
2026-07-09

Context

Context window
1.05M
Max input
922K
Max output
128K

Pricing · USD / 1M tokens

Input
$2
Output
$12
Cache read
$0.2
Cache write
$2.5

Modalities

Input
TextImage
Output
Text

API

API types
chatresponsesbatch

Reasoning

Reasoning
Yes
Levels
nonelowmediumhighxhighmax

Info

Status
Active
Released
2026-07-09
Knowledge cutoff
2026-02-16

Features

Confirmed
toolsstructured_outputstreamingcachingbatch
Source · official docsVerified 2026-10-11

How to call

1 provider

openaimodel = gpt-5.6-terrareasoning = reasoning.effort

chat
POSThttps://api.openai.com/v1/chat/completions
responses
POSThttps://api.openai.com/v1/responses
batch
POSThttps://api.openai.com/v1/batches

JSON

Standard format
gpt-5.6-terra.json
{
  "id": "gpt-5.6-terra",
  "object": "model",
  "created": 1783555200,
  "owned_by": "openai",
  "name": "GPT-5.6 Terra",
  "api": {
    "types": [
      "chat",
      "responses",
      "batch"
    ]
  },
  "limits": {
    "context": 1050000,
    "input": 922000,
    "output": 128000
  },
  "modalities": {
    "input": [
      "text",
      "image"
    ],
    "output": [
      "text"
    ]
  },
  "reasoning": {
    "supported": true,
    "efforts": [
      "none",
      "low",
      "medium",
      "high",
      "xhigh",
      "max"
    ]
  },
  "pricing": {
    "currency": "USD",
    "unit": "1M_tokens",
    "input": 2,
    "output": 12,
    "cache_read": 0.2,
    "cache_write": 2.5
  },
  "features": [
    "tools",
    "structured_output",
    "streaming",
    "caching",
    "batch"
  ],
  "info": {
    "status": "active",
    "release_date": "2026-07-09",
    "knowledge_cutoff": "2026-02-16",
    "description": "GPT-5.6 model that balances intelligence and cost.",
    "docs": "https://developers.openai.com/api/docs/models/gpt-5.6-terra",
    "verified_at": "2026-10-11"
  }
}

Official sources

4