How much does GPT-5.6 Terra cost?

GPT-5.6 Terra costs $2.00 per million input tokens and $12 per million output tokens on standard pricing; other tiers (Standard, Batch, Flex) are also available. A workload of 20M input and 5M output tokens a month is about $100.

What is the context length of GPT-5.6 Terra?

GPT-5.6 Terra accepts up to 1,050,000 tokens (1.1M) of input and can return up to 128,000 tokens in one response.

Does GPT-5.6 Terra support tool calling and structured outputs?

Yes, GPT-5.6 Terra supports function/tool calling and structured (JSON) outputs. Supported tools: Function calling, Structured outputs, JSON mode, Reasoning, Deterministic seed, Prompt caching.

What inputs and outputs does GPT-5.6 Terra support?

GPT-5.6 Terra accepts PDF, Image, Text as input and produces Text as output.

Which providers serve GPT-5.6 Terra?

GPT-5.6 Terra is available from 7 API providers: OpenAI, Azure, OpenAI, Azure, Amazon Bedrock, Azure, OpenAI. Prices can differ by provider.

When was GPT-5.6 Terra released?

GPT-5.6 Terra was released by OpenAI in 2026.

GPT-5.6 Terra

gpt-5.6-terra

API Provider site

Mid-tier GPT-5.6 model and OpenAI's recommended replacement for o4-mini and GPT-5 mini. Built by OpenAI.

Prices updated recently

Input price

$2.00

per 1M tokens · Standard

Output price

$12

per 1M tokens · Standard

Input limit

1.1M

tokens

Output limit

128K

tokens

Input formats

TextImageVideoAudioPDF

Output formats

TextImageVideoAudioPDF

Compare

GPT-5.6 Terra price history

2 price records since 9/25/2026

GPT-5.6 Terra cost calculator

Input20M tokens

Output5M tokens

$100/month

Standard pricing

Overview

What is GPT-5.6 Terra?

GPT-5.6 Terra is a text & reasoning and code & slms and vision model from OpenAI. Mid-tier GPT-5.6 model and OpenAI's recommended replacement for o4-mini and GPT-5 mini. Its 1.1M context window and $2.00 input price make it a candidate for quality-focused production applications.

Code generationAgent workflowsImage understandingDocument analysis

Benchmarks

GPT-5.6 Terra benchmarks & speed

How GPT-5.6 Terra scores on standardized evaluations, and where it lands among every model we track.

42.1

Intelligence Index

Better than 91% of 153 models

111tok/s

Output speed

Better than 61% of 119 models

1245

DesignArena Elo

Better than 59% of 81 models

Reasoning

GPQA Diamond

92.5%

Graduate-level scientific reasoning · top 12%

HLE

42.9%

Humanity's Last Exam · top 13%

Coding

SciCode

55.0%

Python for scientific computing · top 28%

Latency & design

Time to first token: 121.77s
DesignArena win rate: 48.5%
Design battles judged: 72,172

Independent scores from Artificial Analysis and DesignArena · updated 10/8/2026. Higher is better; ranks compare against every model we track with that score.

Rates

GPT-5.6 Terra pricing

Pricing is based on token usage. Provider-specific caching, batch, regional, and tool charges may affect the final cost.

Input · Standard

$2.00

Per 1M tokens

Cached input · Standard

$0.20

Per 1M tokens

Capabilities

GPT-5.6 Terra Tools

Tools available when using GPT-5.6 Terra through supported provider APIs.

Function calling

Supported

Structured outputs

Supported

JSON mode

Supported

Reasoning

Supported

Built-in web search

Not supported

Log probabilities

Not supported

Deterministic seed

Supported

Parallel tool calls

Not supported

Prompt caching

Supported

Where to run it

GPT-5.6 Terra API providers

7 providers serve GPT-5.6 Terra. Prices are per 1M tokens; uptime is the last 24 hours.

Provider	Input	Output	Cached	Context	Uptime
OpenAI	$1.00	$6.00	$0.10	1.1M	100%
Azure	$2.00	$12	$0.20	1.1M	99.98%
OpenAI	$2.00	$12	$0.20	1.1M	99.93%
Azure	$2.20	$13	$0.22	1.1M	100%
Amazon Bedrock	$2.20	$13	$0.22	1.1M	35.69%
Azure	$2.20	$13	$0.22	1.1M	99.97%
OpenAI	$4.00	$24	$0.40	1.1M	100%

OpenAI

Input: $1.00
Output: $6.00
Cached: $0.10
Context: 1.1M
Uptime: 100%

Azure

Input: $2.00
Output: $12
Cached: $0.20
Context: 1.1M
Uptime: 99.98%

OpenAI

Input: $2.00
Output: $12
Cached: $0.20
Context: 1.1M
Uptime: 99.93%

Azure

Input: $2.20
Output: $13
Cached: $0.22
Context: 1.1M
Uptime: 100%

Amazon Bedrock

Input: $2.20
Output: $13
Cached: $0.22
Context: 1.1M
Uptime: 35.69%

Azure

Input: $2.20
Output: $13
Cached: $0.22
Context: 1.1M
Uptime: 99.97%

6 of 7

Strengths and limitations

Strengths

Measured results (AA Intelligence 42.1 · DesignArena Elo 1245 · Arena Elo 1233 · MMLU-Pro 79.1%) position it for demanding production work.
1.1M context supports large documents, repositories and extended conversations.
Supports text & reasoning and code & slms and vision workloads in one model.

Limitations

Generated tokens cost 6× more than input tokens, which matters for verbose responses.
Large context capacity does not guarantee consistent retrieval across the entire prompt.
Arena Elo and MMLU-Pro are directional; test accuracy, latency and reliability on your own workload before committing.

Arena Elo, MMLU-Pro and pricing figures are illustrative; validate current vendor terms before purchase.

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Frequently asked questions about GPT-5.6 Terra

GPT-5.6 Terra is a text & reasoning and code & slms and vision model from OpenAI. Mid-tier GPT-5.6 model and OpenAI's recommended replacement for o4-mini and GPT-5 mini.